Vocabulary

  • have to: Must do
  • of course: Sure ; Certainly
  • interact with
  • show up: To arrive or be seen at a place, e.g. a party
  • depending on: To rely on for support (financial or emotional)
  • heat up: To become warmer; to make something warmer.
  • off of: From a position on something; down from.
  • wind up: To be brought to a state of great tension
  • talking about: To discuss a particular topic.
  • in fact: Used to emphasize the truth of a statement, especially one that contrasts with or contradicts something else.
  • think of: To look on as (being something specific); consider
  • for example: As an illustration or instance.
  • look at: To use your eyes to focus on something
  • in practice: In reality or actual use; as opposed to in theory.
  • going on: To continue doing something
  • inside of: Within; in the inner part of.
  • on fire: Very successful or popular
  • see in: To accompany someone to the entrance of a building or room.
  • land on: To come down to the ground or another surface after flying or falling.
  • used to: Did regularly before, but don't do now
  • number of people: The total count of individuals within a group or gathering.
  • whole class: The entirety of a class of students.
  • as a whole: Considering everything together; in general.
  • break down: To forcibly break, destroy or make collapse
  • come from: To have as your native country or city
  • in the world: Used to emphasize a question expressing surprise, confusion, disbelief
  • fly through: To move or pass through something very quickly.
  • in reality: Actually; in fact; truly.
  • lead to: To result in some action
  • right next to: Immediately adjacent to; in very close proximity to.
  • next to: Being located along side another
  • think about: To consider something carefully.
  • rule of thumb: A practical and approximate way of doing or measuring something.
  • a couple hundred: Approximately two hundred.
  • in places: In some locations but not others
  • point out: To make others aware of an idea
  • goes to show: To demonstrate or prove something.
  • speed up: To move more quickly
  • rate as: To consider someone or something to be of a particular quality or standard.
  • in mind: Being aware of or considering something.
  • figure out: To understand the behavior of someone
  • at times: Sometimes; occasionally.
  • work out
  • hold it together: To remain calm and composed in a tough situation.
  • in principle: In theory; as a general idea, though not yet in practice or detail.
  • break up
  • deal with
  • in terms of
  • no matter: Regardless of; it does not matter.
  • in the air: Present or circulating in the atmosphere.
  • on a stick: Food that is served on a stick
  • leak out: If secret information leaks out, it becomes known to the public.
  • to the point: Expressing something directly and without unnecessary detail.
  • outside of: Located or situated beyond the boundaries or confines of something.
  • rip off: To cheat; take advantage of; charge too much
  • catch on: To become popular; start to be used
  • seal off: To close an entrance to a place
  • other than: Except for; apart from.
  • in order to: For the purpose of; with the aim of.
  • per year: For each year; annually.
  • start out: To begin your life or career in a particular way.
  • go straight: To continue in the same direction without turning.
  • wait for: To wait until someone comes, or something happens
  • based on: To use something as the foundation or starting point for something else.
  • go back to: To return to a starting point
  • all over the place: In a state of disorder; scattered everywhere.
  • fix the problem: To find a solution to a problem; to repair something that is broken.
  • pick up on: To notice or become aware of something that is not obvious.
  • stuff: Generic description for things, materials, objects
  • sort: To organize things by putting them into groups
  • essentially: Basically; (said when stating the basic facts)
  • assume: To act in a false manner to mislead others
  • process: To organize and use data in a computer
  • basically: Used before you explain something simply, clearly
  • matter: To be of great importance; to count
  • typically: In a normal or usual way
  • treat: To pay for the food or enjoyment of someone else
  • interact: To talk or do things with each other
  • roughly: Approximately; (of numbers) about; around
  • pressure: Anxiety caused by difficult problems
  • bit: Device put in a horse's mouth to control it
  • fuel: To give power to (a mob, anger, etc.); incite
  • interaction: Process of people or things affecting each other
  • path: Method of living leading to a particular result
  • vessel: Container, such as a cup, for holding liquids
  • charge: To run quickly toward someone to attack them
  • factor: Something that influences a result
  • reaction: Bodily response to a drug or something eaten
  • effect: An advantage, benefit
  • mass: Religious ceremony in some Christian churches
  • rate: To assess something or consider its qualities
  • ground: To break (coffee, etc.) into tiny bits with machine
  • tissue: Substance formed by cells of living thing; flesh
  • ingest: To eat, drink, or swallow something
  • radiation: Energy transmitted as rays, waves or particles
  • energy: Physical or mental strength
  • source: Piece of information; a person giving information
  • activity: An action or task, e.g. sports, washing clothes
  • lot: What happens to a person in life from chance; fate
  • kind: In a caring and helpful manner
  • decay: To be slowly destroyed by natural processes; rot
  • secular: Not connected or controlled by religious beliefs
  • multiply: To increase in number by reproducing/having babies
  • dose: An amount of medicine to be taken at any one time
  • bucket: Open container with a handle used to carry liquids
  • accident: Sudden unplanned event causing damage, injury etc.
  • particle: Adverb or preposition that joins with a verb
  • hydrogen: Lightest of all chemical elements
  • penetrate: To enter or pass through something
  • remember: To give someone a gift, e.g. birthday, wedding
  • potassium: A common, soft, silvery white metal with many uses
  • bundle: A group of things that are tied/fastened together
  • leak: Act of (gas, liquid) escaping through a small hole
  • nucleus: Center of an atom
  • start: First time or place that a thing exists; beginning
  • life: All the living things e.g. animals, plants, humans
  • problem: Something difficult to deal with or causes trouble
  • anti: A prefix meaning 'against' or 'opposed'
  • fallout: Radioactive particles after a nuclear explosion
  • unit: One apartment in a building
  • calculate: To find an answer using mathematics
  • calculation: Process or result of using mathematics
  • photon: Particle with energy but no mass, electric charge
  • electron: A negatively charged particle
  • fission: Form of nuclear energy where particles combine
  • iodine: Substance used on burns, etc. to prevent infection
  • dna: Chemical in living cells with genetic information
  • beta: Test version of a product or software
  • radon: Radioactive gas coming naturally from the ground
  • gamma: Third letter of the Greek alphabet
  • ammonium: A chemical derived from ammonia
  • neutrino: Tiny particle with no electrical charge
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  • not found vocabularyNo vocabulary matches your filters
    • a couple hundred

      US

      UK

      • Determiner
      • Approximately two hundred.
      • Phrase
      • A small number of hundreds; more than one hundred but not many.
      A2
      More
    • all over the place

      US

      UK

      • Phrase
      • In a state of disorder; scattered everywhere.
      • In many different locations; widely distributed.
      • Adjective
      • Mentally or emotionally disorganized; confused or erratic.
      A1
      More
    • ammonium

      US /əˈmoʊniəm/

      UK /əˈməʊniəm/

      • Uncountable Noun
      • A chemical derived from ammonia
      • A salt or compound containing the NH4+ ion, often used in fertilizers.
      B2
      More
    • anti

      US /ˈæntaɪ, -ti/

      UK /'æntɪ/

      • Adjective
      • A prefix meaning 'against' or 'opposed'
      B2
      More
    • as a whole

      US /æz e hol/

      UK /æz ə həul/

      • Phrase
      • Considering everything together; in general.
      • Complete; not divided or incomplete.
      • Adjective
      • Complete; not divided or fragmented.
      A1
      More
    • assume

      US /əˈsum/

      UK /ə'sju:m/

      • Transitive Verb
      • To act in a false manner to mislead others
      • To believe, based on the evidence; suppose
      A2TOEIC
      More
    • at times

      US /æt taɪmz/

      UK /æt taɪmz/

      • Phrase
      • Sometimes; occasionally.
      A1
      More
    • based on

      US

      UK

      • Phrasal Verb
      • To use something as the foundation or starting point for something else.
      • Preposition
      • Using something as the main idea or foundation.
      • Relying on something as evidence or justification.
      A1
      More
    • basically

      US /ˈbesɪkəli,-kli/

      UK /ˈbeɪsɪkli/

      • Adverb
      • Used before you explain something simply, clearly
      • In essence; when you consider the most important aspects of something.
      A2
      More
    • beta

      US /'beɪtə/

      UK /'bi:tə/

      • Noun
      • Test version of a product or software
      B2
      More
    • break down

      US /brek daʊn/

      UK /breik daun/

      • Phrasal Verb
      • To forcibly break, destroy or make collapse
      • (Machine) to stop working or become weaker
      A1
      More
    • break up

      US /brek ʌp/

      UK /breik ʌp/

      • Phrase
      • Phrasal Verb
      • (Of party, relationship) to come to an end
      • To end something, e.g. a fight
      A1
      More
    • bucket

      US /ˈbʌkɪt/

      UK /'bʌkɪt/

      • Countable Noun
      • Open container with a handle used to carry liquids
      • A scoop-like container attached to machinery, used for digging or lifting materials.
      • Uncountable Noun
      • The amount held by a bucket.
      B1
      More
    • bundle

      US /ˈbʌndl/

      UK /ˈbʌndl/

      • Countable Noun
      • A group of things that are tied/fastened together
      • A set of products sold together cheaply
      • Transitive Verb
      • To fasten, tie or wrap several things together
      • To sell a set of products at a lower price
      B1
      More
    • calculate

      US /ˈkælkjəˌlet/

      UK /'kælkjʊleɪt/

      • Transitive Verb
      • To find an answer using mathematics
      • To make an educated guess about something
      B2
      More
    • calculation

      US /ˌkælkjəˈleʃən/

      UK /ˌkælkjuˈleɪʃn/

      • Noun (Countable/Uncountable)
      • Process or result of using mathematics
      • An educated guess about something
      B2
      More
    • catch on

      US /kætʃ ɑn/

      UK /kætʃ ɔn/

      • Phrasal Verb
      • To become popular; start to be used
      • To get the idea of; suddenly understand
      A1
      More
    • charge

      US /tʃɑrdʒ/

      UK /tʃɑ:dʒ/

      • Verb (Transitive/Intransitive)
      • To run quickly toward someone to attack them
      • To ask for money as a price for a service or goods
      • Noun (Countable/Uncountable)
      • An attack by running quickly toward someone
      • A price for a service or goods
      A2
      More
    • come from

      US /kʌm frʌm/

      UK /kʌm frɔm/

      • Phrasal Verb
      • To have as your native country or city
      A1
      More
    • deal with

      US /dil wɪð/

      UK /di:l wið/

      • Verb (Transitive/Intransitive)
      • To buy or sell goods or services.
      • Phrasal Verb
      • To take action to solve a problem or manage a situation.
      • To be about; concern.
      A1
      More
    • decay

      US /dɪˈke/

      UK /dɪˈkeɪ/

      • Intransitive Verb
      • To be slowly destroyed by natural processes; rot
      • To lose health or strength
      • Uncountable Noun
      • Slow loss of physical or mental health
      B1
      More
    • depending on

      US

      UK

      • Phrasal Verb
      • To rely on for support (financial or emotional)
      • Influenced or determined by.
      • Preposition
      • Subject to; contingent on
      • Relying on someone or something for support or assistance.
      A2
      More
    • dna

      US

      UK

      • Noun (Countable/Uncountable)
      • Chemical in living cells with genetic information
      B2
      More
    • dose

      US /doʊs/

      UK /dəʊs/

      • Noun (Countable/Uncountable)
      • An amount of medicine to be taken at any one time
      • Transitive Verb
      • To give a certain amount of something to someone
      B1
      More
    • electron

      US /ɪˈlektrɑ:n/

      UK /ɪˈlektrɒn/

      • Countable Noun
      • A negatively charged particle
      B2
      More
    • energy

      US /ˈɛnədʒi/

      UK /'enədʒɪ/

      • Noun (Countable/Uncountable)
      • Physical or mental strength
      • Enthusiasm and determination.
      A2
      More
    • essentially

      US /ɪˈsenʃəli/

      UK /ɪˈsenʃəli/

      • Adverb
      • Basically; (said when stating the basic facts)
      • Used to emphasize the basic truth or fact of a situation.
      A2
      More
    • factor

      US /ˈfæktɚ/

      UK /'fæktə(r)/

      • Noun
      • Something that influences a result
      • Transitive Verb
      • To consider or include in an estimate or judgment
      • To find the two numbers a number can be divided by
      A2TOEIC
      More
    • fallout

      US /ˈfɔlˌaʊt/

      UK /'fɔ:laʊt/

      • Noun (Countable/Uncountable)
      • Radioactive particles after a nuclear explosion
      • The adverse results of a situation or action.
      C2
      More
    • figure out

      US /ˈfɪɡjɚ aʊt/

      UK /ˈfiɡə aut/

      • Phrasal Verb
      • To understand the behavior of someone
      • To think through logically to find a solution
      • Verb (Transitive/Intransitive)
      • To understand or find an answer to something.
      • To find a solution to a problem or understand something.
      A1
      More
    • fission

      US /ˈfɪʃən/

      UK /ˈfɪʃn/

      • Noun
      • Form of nuclear energy where particles combine
      C1TOEIC
      More
    • fix the problem

      US

      UK

      • Transitive Verb
      • To find a solution to a problem; to repair something that is broken.
      A1
      More
    • fly through

      US

      UK

      • Phrasal Verb
      • To move or pass through something very quickly.
      • To complete something quickly and easily.
      A1
      More
    • for example

      US

      UK

      • Phrase
      • As an illustration or instance.
      More
    • fuel

      US /ˈfjuəl/

      UK /'fju:əl/

      • Transitive Verb
      • To give power to (a mob, anger, etc.); incite
      • To provide gas or petrol for something
      • Uncountable Noun
      • Material used to produce heat or power when burned
      A2TOEIC
      More
    • gamma

      US /ˈɡæmə/

      UK /'ɡæmə/

      • Noun
      • Third letter of the Greek alphabet
      B2
      More
    • go back to

      US /ɡo bæk tu/

      UK /ɡəu bæk tu:/

      • Phrasal Verb
      • To return to a starting point
      A1
      More
    • go straight

      US /ɡo stret/

      UK /ɡəu streit/

      • Intransitive Verb
      • To continue in the same direction without turning.
      • To start living an honest and law-abiding life.
      A1
      More
    • goes to show

      US

      UK

      • Phrase
      • To demonstrate or prove something.
      A1
      More
    • going on

      US /ˈɡoɪŋ ɑn/

      UK /ˈgəʊɪŋ ɔn/

      • Phrasal Verb
      • To continue doing something
      • To happen (usually negative)
      A1
      More
    • have to

      US /hæv tu/

      UK /ˈhæv tə/

      • Auxiliary Verb
      • Must do
      A1
      More
    • heat up

      US /hit ʌp/

      UK /hi:t ʌp/

      • Phrasal Verb
      • To become warmer; to make something warmer.
      • To become excited or agitated.
      A1
      More
    • hold it together

      US /hoʊld ɪt təˈɡɛðɚ/

      UK /hould ɪt təˈɡeðə/

      • other
      • To remain calm and composed in a tough situation.
      B2
      More
    • hydrogen

      US /ˈhaɪdrədʒən/

      UK /ˈhaɪdrədʒən/

      • Uncountable Noun
      • Lightest of all chemical elements
      B1
      More
    • in fact

      US /ɪn fækt/

      UK /in fækt/

      • Adverb
      • Used to emphasize the truth of a statement, especially one that contrasts with or contradicts something else.
      • Used to introduce a more detailed or surprising piece of information.
      • Phrase
      • Used to emphasize the truth of a statement, especially one that is surprising or contrary to what might be expected.
      C1
      More
    • in mind

      US /ɪn maɪnd/

      UK /in maind/

      • Phrase
      • Being aware of or considering something.
      • To remember or consider something.
      A2
      More
    • in order to

      US /ɪn ˈɔrdɚ tu/

      UK /in ˈɔ:də tu:/

      • Preposition
      • For the purpose of; with the aim of.
      • Phrase
      • In a specific sequence or arrangement.
      • With the aim of; for the purpose of.
      C1
      More
    • in places

      US

      UK

      • Phrase
      • In some locations but not others
      A1
      More
    • in practice

      US /ɪn ˈpræktɪs/

      UK /in ˈpræktis/

      • Phrase
      • In reality or actual use; as opposed to in theory.
      A1
      More
    • in principle

      US /ɪn ˈprɪnsəpəl/

      UK /in ˈprinsəpl/

      • Phrase
      • In theory; as a general idea, though not yet in practice or detail.
      C1
      More
    • in reality

      US /ɪn riˈælɪti/

      UK /in riˈæliti/

      • Phrase
      • Actually; in fact; truly.
      B2
      More
    • in terms of

      US

      UK

      • Phrase
      • With regard to; concerning a particular aspect.
      A1
      More
    • in the air

      US

      UK

      • Phrase
      • Present or circulating in the atmosphere.
      • Felt or sensed by many people; circulating as a rumor or feeling.
      • Adjective
      • Being broadcast on radio or television.
      A1
      More
    • in the world

      US /ɪn ði wɜrld/

      UK /in ðə wɜː(r)ld/

      • Phrase
      • Used to emphasize a question expressing surprise, confusion, disbelief
      • Used to indicate the extent or degree of something, often in a superlative sense
      A1
      More
    • ingest

      US /ɪn'dʒest/

      UK /ɪnˈdʒest/

      • Transitive Verb
      • To eat, drink, or swallow something
      C1TOEIC
      More
    • inside of

      US /ɪnˈsaɪd ʌv/

      UK /inˈsaid ɔv/

      • Preposition
      • Within; in the inner part of.
      • Within a certain period of time.
      A1
      More
    • interact

      US /ˌɪntɚˈækt/

      UK /ˌɪntər'ækt/

      • Intransitive Verb
      • To talk or do things with each other
      A2
      More
    • interact with

      US /ˌɪntɚˈækt wɪð/

      UK /ˌɪntərˈækt wið/

      • Phrase
      • Verb (Transitive/Intransitive)
      • To engage in communication or action involving mutual or reciprocal influence.
      • To use a computer interface to achieve a specific goal.
      A2
      More
    • interaction

      US /ˌɪntɚˈækʃən/

      UK /ˌɪntər'ækʃn/

      • Noun (Countable/Uncountable)
      • Process of people or things affecting each other
      • The activity of talking to other people, working together etc
      A2
      More
    • iodine

      US /ˈaɪədaɪn/

      UK /ˈaɪədi:n/

      • Uncountable Noun
      • Substance used on burns, etc. to prevent infection
      C2
      More
    • land on

      US

      UK

      • Phrasal Verb
      • To come down to the ground or another surface after flying or falling.
      • To criticize someone severely.
      B1
      More
    • lead to

      US /lid tu/

      UK /li:d tu:/

      • Phrasal Verb
      • To result in some action
      • Verb (Transitive/Intransitive)
      • To have something as a consequence or result.
      A1
      More
    • leak

      US /lik/

      UK /li:k/

      • Noun (Countable/Uncountable)
      • Act of (gas, liquid) escaping through a small hole
      • Information released that wasn't supposed to be
      • Intransitive Verb
      • (Of a tire) to have air, liquid escaping; (Of air)
      • (Liquid) to go out of/get in through crack/opening
      B1
      More
    • leak out

      US

      UK

      • Phrasal Verb
      • If secret information leaks out, it becomes known to the public.
      • To escape or be lost through a crack or hole.
      B2
      More
    • look at

      US /lʊk æt/

      UK /luk æt/

      • Phrasal Verb
      • To use your eyes to focus on something
      • To focus your eyes on something carefully
      A1
      More
    • mass

      US /mæs/

      UK /mæs/

      • Noun (Countable/Uncountable)
      • Religious ceremony in some Christian churches
      • Large amount or number of something
      • Transitive Verb
      • To gather people or things into a large group
      B1
      More
    • multiply

      US /ˈmʌltəˌplaɪ/

      UK /ˈmʌltɪplaɪ/

      • Verb (Transitive/Intransitive)
      • To increase in number by reproducing/having babies
      • To increase something by a large quantity
      B1
      More
    • neutrino

      US /nu:'tri:noʊ/

      UK /nju:'tri:nəʊ/

      • Noun
      • Tiny particle with no electrical charge
      C1
      More
    • next to

      US /nɛkst tu/

      UK /nekst tu:/

      • Preposition
      • Being located along side another
      • In comparison with
      • Adverb
      • Almost; nearly
      A1
      More
    • no matter

      US

      UK

      • Conjunction
      • Regardless of; it does not matter.
      • Adverb
      • Regardless of; it is not important
      A1
      More
    • nucleus

      US /ˈnu:kliəs/

      UK /ˈnju:kliəs/

      • Noun
      • Center of an atom
      • Control center of a cell
      B2
      More
    • number of people

      US /ˈnʌmbɚ ʌv ˈpipəl/

      UK /ˈnʌmbə ɔv ˈpi:pl/

      • Phrase
      • The total count of individuals within a group or gathering.
      • A statistical figure representing the population size or a subset thereof.
      A1
      More
    • of course

      US /ʌv kɔː(r)s/

      UK /ɔv kɔː(r)s/

      • Adverb
      • Sure ; Certainly
      • Phrase
      • For sure; certainly
      A2
      More
    • off of

      US /ɔf ʌv/

      UK /ɔf ɔv/

      • Preposition
      • From a position on something; down from.
      A1
      More
    • on a stick

      US

      UK

      • Adjective
      • Food that is served on a stick
      • Noun
      • An object attached to a stick, often for play or display
      B1
      More
    • on fire

      US /ɑn faɪr/

      UK /ɔn ˈfaiə/

      • Adjective
      • Very successful or popular
      • Burning
      A2
      More
    • other than

      US

      UK

      • Preposition
      • Except for; apart from.
      • Conjunction
      • Different from.
      A1
      More
    • outside of

      US /aʊtˈsaɪd ʌv/

      UK /ˌautˈsaid ɔv/

      • Preposition
      • Located or situated beyond the boundaries or confines of something.
      • Beyond the scope, range, or limits of something.
      A1
      More
    • particle

      US /ˈpɑrtɪkəl/

      UK /ˈpɑ:tɪkl/

      • Noun
      • Adverb or preposition that joins with a verb
      • Tiny piece or quantity of something
      B1
      More
    • path

      US /pæθ, pɑθ/

      UK /pɑ:θ/

      • Noun
      • Method of living leading to a particular result
      • Track made with stones, by walking over the ground
      A2TOEIC
      More
    • penetrate

      US /ˈpɛnɪˌtret/

      UK /ˈpenɪtreɪt/

      • Transitive Verb
      • To enter or pass through something
      • To gain a market in a new area or country
      B1
      More
    • per year

      US

      UK

      • Phrase
      • For each year; annually.
      A2
      More
    • photon

      US /ˈfoʊtɑ:n/

      UK /ˈfəʊtɒn/

      • Noun
      • Particle with energy but no mass, electric charge
      B2
      More
    • pick up on

      US

      UK

      • Phrasal Verb
      • To notice or become aware of something that is not obvious.
      • To learn something by watching or listening to other people.
      A1
      More
    • point out

      US /pɔɪnt aʊt/

      UK /pɔint aut/

      • Phrasal Verb
      • To make others aware of an idea
      • To draw attention to something or someone
      A1
      More
    • potassium

      US /pəˈtæsiəm/

      UK /pəˈtæsiəm/

      • Uncountable Noun
      • A common, soft, silvery white metal with many uses
      • Potassium as a nutrient found in food.
      B2
      More
    • pressure

      US /ˈprɛʃɚ/

      UK /'preʃə(r)/

      • Noun (Countable/Uncountable)
      • Anxiety caused by difficult problems
      • Force, weight when pressing against a thing
      • Transitive Verb
      • To apply force to something
      • To persuade or force someone to do something
      A2TOEIC
      More
    • process

      US /ˈprɑsˌɛs, ˈproˌsɛs/

      UK /prə'ses/

      • Transitive Verb
      • To organize and use data in a computer
      • To deal with official forms in the way required
      • Noun (Countable/Uncountable)
      • Dealing with official forms in the way required
      • Set of changes that occur slowly and naturally
      A2TOEIC
      More
    • radiation

      US /ˌrediˈeʃən/

      UK /ˌreɪdiˈeɪʃn/

      • Noun (Countable/Uncountable)
      • Energy transmitted as rays, waves or particles
      • Harmful waves of energy from nuclear activity
      B1
      More
    • radon

      US

      UK

      • Uncountable Noun
      • Radioactive gas coming naturally from the ground
      C1
      More
    • rate as

      US

      UK

      • Phrasal Verb
      • To consider someone or something to be of a particular quality or standard.
      B1
      More
    • reaction

      US /riˈækʃən/

      UK /rɪ'ækʃn/

      • Noun
      • Bodily response to a drug or something eaten
      • Feeling or action in response to something
      A2
      More
    • right next to

      US

      UK

      • Preposition
      • Immediately adjacent to; in very close proximity to.
      • Figuratively very close to; on the verge of.
      A1
      More
    • rip off

      US /rɪp ɔf/

      UK /rip ɔf/

      • Phrasal Verb
      • To cheat; take advantage of; charge too much
      • To steal something.
      • Transitive Verb
      • To overcharge or defraud someone.
      • To steal something quickly.
      B1
      More
    • roughly

      US /ˈrʌflɪ/

      UK /ˈrʌfli/

      • Adverb
      • Approximately; (of numbers) about; around
      • In a manner that is violent or not careful
      B1
      More
    • rule of thumb

      US /rul ʌv θʌm/

      UK /ru:l ɔv θʌm/

      • Noun (Countable/Uncountable)
      • A practical and approximate way of doing or measuring something.
      • A broadly accurate guide or principle, based on practice rather than theory.
      A1
      More
    • seal off

      US /sil ɔf/

      UK /si:l ɔf/

      • Phrasal Verb
      • To close an entrance to a place
      B1
      More
    • secular

      US /ˈsɛkjəlɚ/

      UK /ˈsekjələ(r)/

      • Adjective
      • Not connected or controlled by religious beliefs
      B2TOEIC
      More
    • see in

      US /si ɪn/

      UK /si: in/

      • Phrasal Verb
      • To accompany someone to the entrance of a building or room.
      A1
      More
    • show up

      US /ʃo ʌp/

      UK /ʃəu ʌp/

      • Phrasal Verb
      • To arrive or be seen at a place, e.g. a party
      • To be noticeably better than (someone else)
      A1
      More
    • source

      US /sɔrs, sors/

      UK /sɔ:s/

      • Noun (Countable/Uncountable)
      • Piece of information; a person giving information
      • Place from which something necessary comes
      • Adjective
      • Produces or provides what is wanted or needed
      A2TOEIC
      More
    • speed up

      US /spid ʌp/

      UK /spi:d ʌp/

      • Phrasal Verb
      • To move more quickly
      A2
      More
    • start out

      US /stɑrt aʊt/

      UK /stɑ:t aut/

      • Phrasal Verb
      • To begin your life or career in a particular way.
      • To begin a journey.
      A1
      More
    • stuff

      US /stʌf/

      UK /stʌf/

      • Uncountable Noun
      • Generic description for things, materials, objects
      • Transitive Verb
      • To push material inside something, with force
      B1
      More
    • talking about

      US

      UK

      • Phrasal Verb
      • To discuss a particular topic.
      • To be constantly mentioning or bringing up a subject.
      A1
      More
    • think about

      US /θɪŋk əˈbaʊt/

      UK /θiŋk əˈbaut/

      • Phrasal Verb
      • To consider something carefully.
      • To remember or call to mind.
      A1
      More
    • think of

      US /θɪŋk ʌv/

      UK /θiŋk ɔv/

      • Phrasal Verb
      • To look on as (being something specific); consider
      • To consider or remember something.
      • Verb (Transitive/Intransitive)
      • To imagine or call something to mind
      A1
      More
    • tissue

      US /ˈtɪʃu/

      UK /ˈtɪʃu:/

      • Noun (Countable/Uncountable)
      • Substance formed by cells of living thing; flesh
      • Kind of thin, light paper used to pack objects
      A2
      More
    • to the point

      US /tu ði pɔɪnt/

      UK /tu: ðə pɔint/

      • Adjective
      • Expressing something directly and without unnecessary detail.
      • Phrase
      • Relevant and pertinent to the matter at hand.
      A2
      More
    • typically

      US /ˈtɪpɪklɪ/

      UK /ˈtɪpɪkli/

      • Adverb
      • In a normal or usual way
      B1
      More
    • unit

      US /ˈjunɪt/

      UK /ˈju:nɪt/

      • Countable Noun
      • One apartment in a building
      • Group of people, e.g. soldiers, that work together
      B2TOEIC
      More
    • used to

      US /juzd tu/

      UK /ˈju:st tə/

      • Adjective
      • Did regularly before, but don't do now
      • Auxiliary Verb
      • Have done before, but do not do now
      A1
      More
    • vessel

      US /ˈvɛsəl/

      UK /ˈvesl/

      • Countable Noun
      • Container, such as a cup, for holding liquids
      • A ship or boat; something that carries things
      B1TOEIC
      More
    • wait for

      US /wet fɔr/

      UK /weit fɔ:/

      • Phrasal Verb
      • To wait until someone comes, or something happens
      A1
      More
    • whole class

      US

      UK

      • Noun (Countable/Uncountable)
      • The entirety of a class of students.
      • Adjective
      • Involving or pertaining to the entire class.
      A1
      More
    • wind up

      US //ˈwaɪndˌʌp//

      UK //ˈwaɪndˌʌp//

      • Phrasal Verb
      • To be brought to a state of great tension
      • To close or finalize something
      • Verb (Transitive/Intransitive)
      • To arrive or end up in a particular state, situation, or place, especially unintentionally.
      • To bring something to an end; to conclude or finish something.
      A1
      More
    • work out

      US /wɚk aʊt/

      UK /wə:k aut/

      • Phrasal Verb
      • To find a way to do something, by thinking
      A1
      More
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    01:03

    She took a brave step forward, leaving behind her comfort zone to chase her dreams.

    Vocabulary
    • brave

      adj. Having courage

    • comfort zone

      phr. A familiar situation where one feels safe

    Explanation
    a brave step is a noun phrase, where brave is an adjective modifying the noun step, meaning "a courageous step". forward is an adverb modifying step, meaning "ahead". The whole phrase serves as the object, answering the "what" of took (verb) — she took a brave step forward.

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    brave

    US/brev/
    UK/breɪv/
    adj.Brave
    v.t.To bravely face
    A2 Elementary

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    B1
    #decay#fuel#radiation#dose#electron#photon

    Lecture 12: Introduction to Radiation Risk

    0
    林宜悉 posted on 2026/07/20
    Ever wondered about the different types of radiation and how they interact with matter? This lecture dives into the fascinating world of ionizing and non-ionizing radiation, explaining concepts like the photoelectric effect, Compton scattering, and pair production. You'll pick up key terms like 'photons,' 'alpha particles,' and 'high LET' to better understand radiation's impact!

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