add on
US /æd ɑn/
UK /æd ɔn/
- Phrasal Verb
- To attach or include something extra.
- Countable Noun
- A feature that can be added to a computer program or website.
A1Moreamoeba
US /əˈmibə/
UK /ə'mi:bə/
- Noun
- Tiny organism consisting of only one cell
C2Morebiological
US /ˌbaɪəˈlɑdʒɪkəl/
UK /ˌbaɪəˈlɒdʒɪkl/
- Adjective
- Being related to life and living things
- A substance, such as a detergent, that contains enzymes.
B1Morechromosome
US /ˈkroʊməsoʊm/
UK /ˈkrəʊməsəʊm/
- Noun
- Cell structures that carry the genetic material
C2Morecontribute
US /kənˈtrɪbjut/
UK /kən'trɪbju:t/
- Verb (Transitive/Intransitive)
- To be a factor in causing something to happen
- To donate, give (money) or help to something
A2Moredescription
US /dɪˈskrɪpʃən/
UK /dɪˈskrɪpʃn/
- Noun
- Explanation of what something is like, looks like
- The type or nature of someone or something.
A2TOEICMoredivide
US /dɪˈvaɪd/
UK /dɪ'vaɪd/
- Verb (Transitive/Intransitive)
- To split numbers by another number, e.g. 6 / 2 = 3
- To separate something into equal pieces
- Noun
- A separation or distinction.
A2TOEICMoredivision
US /dɪˈvɪʒən/
UK /dɪ'vɪʒn/
- Noun (Countable/Uncountable)
- How many times a number is contained in another
- One part of an organization
B1TOEICMoredna
US
UK
- Noun (Countable/Uncountable)
- Chemical in living cells with genetic information
B2Moreduplicate
US /ˈdu:plɪkeɪt/
UK /ˈdju:plɪkeɪt/
- Countable Noun
- Something that is the exact same thing as another
- Transitive Verb
- To make an exact copy of a thing
B2TOEICMoreend up with
US
UK
- Phrasal Verb
- To have something as a result.
A1Moreeventually
US /ɪˈvɛntʃuəli/
UK /ɪˈventʃuəli/
- Adverb
- After a long time; after many attempts; in the end
- At some later time; in the future
A2Morefertilize
US /ˈfɜ:rtəlaɪz/
UK /ˈfɜ:təlaɪz/
- Transitive Verb
- To make pregnant; to put sperm in an egg
- To add chemicals to produce larger, better plants
B1TOEICMorefor example
US
UK
- Phrase
- As an illustration or instance.
gene
US /dʒin/
UK /dʒi:n/
- Noun
- Part of cell controlling development of a thing
B1Moregenerally
US /ˈdʒɛnərəli/
UK /ˈdʒenrəli/
- Adverb
- Usually; as a rule; by, to or for most people
A2Moregenetic
US /dʒəˈnɛtɪk/
UK /dʒəˈnetɪk/
- Adjective
- Of, relating to, or controlled by genes
- Relating to genes or heredity.
B1Moregenetic information
US /dʒəˈnɛtɪk ˌɪnfɚˈmeʃən/
UK /dʒiˈnetik ˌɪnfəˈmeiʃən/
- Uncountable Noun
- Hereditary information encoded in the genetic material (DNA or RNA) of an organism.
genetically
US /dʒə'netɪklɪ/
UK /dʒə'netɪklɪ/
- Adverb
- Caused or controlled, or by genes
- By means of genes or genetic engineering.
B1Morehave to
US /hæv tu/
UK /ˈhæv tə/
- Auxiliary Verb
- Must do
A1Moreidentical
US /aɪˈdɛntɪkəl/
UK /aɪˈdentɪkl/
- Adjective
- The same in every way
- Satisfied by all values of the variables involved.
B1Morein mind
US /ɪn maɪnd/
UK /in maind/
- Phrase
- Being aware of or considering something.
- To remember or consider something.
A2Morein pairs
US
UK
- Phrase
- Divided into or working as two people together.
A1Morein the middle of
US
UK
- Phrase
- In the central part or point of something.
- Engaged or occupied with something.
A2Moreinstead of
US /ɪnˈstɛd ʌv/
UK /inˈsted ɔv/
- Preposition
- When one thing is replaced by another
- Adverb
- As a substitute or alternative.
A1Moreinvolve
US /ɪnˈvɑlv/
UK /ɪn'vɒlv/
- Transitive Verb
- To have or be included as a part of something
- To cause (a person or group) to take part in an event or activity.
A2TOEICMorelead 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.
A1Moremention
US /ˈmɛnʃən/
UK /'menʃn/
- Transitive Verb
- To refer to or talk or write about something
- Uncountable Noun
- Act of referring to or talking about something
- A formal acknowledgement of something
A2TOEICMoremove into
US /muv ˈɪntu/
UK /mu:v ˈɪntuː/
- Phrasal Verb
- To start living in a new house or building
- To start being involved in a new area of business or activity.
nucleus
US /ˈnu:kliəs/
UK /ˈnju:kliəs/
- Noun
- Center of an atom
- Control center of a cell
B2Moreoccur
US /əˈkɚ/
UK /əˈkɜ:(r)/
- Intransitive Verb
- To come to pass or to happen
- To be found to exist; to be present.
A2TOEICMoreon and off
US /ɑn ənd ɔf/
UK /ɔn ænd ɔf/
- Adverb
- Intermittently; not continuously.
- Adjective
- Characterized by periods of involvement and separation.
A1Moreon to
US /ɑn tu/
UK /ɔn tu:/
- Preposition
- Toward something; forward
- Aware of someone's activities.
- Adjective
- Aware of someone's deception or illegal activities.
A1Moreout of the way
US /aʊt ʌv ði we/
UK /aut ɔv ðə wei/
- Adjective
- Remote; isolated.
- No longer obstructing or hindering.
- Phrase
- Not obstructing or impeding progress; in a position where one does not cause an obstruction.
- Completed; finished; no longer needing attention.
B1Morephysical
US /ˈfɪzɪkəl/
UK /ˈfɪzɪkl/
- Countable Noun
- Health check at the doctors' or hospital
- Adjective
- Concerning the body of a person
- Concerning things that can be seen or touched
A2Morepolar
US /ˈpolɚ/
UK /ˈpəʊlə(r)/
- Adjective
- Concerning the areas near the North or South poles
B1Moreprimary
US /ˈpraɪˌmɛri, -məri/
UK /'praɪmərɪ/
- Adjective
- Most important, most basic or essential
- Happening first; earliest
B2Moreprocess
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
A2TOEICMorereduction
US /rɪˈdʌkʃən/
UK /rɪ'dʌkʃn/
- Noun
- Act of making something smaller
B1Moreresult in
US /rɪˈzʌlt ɪn/
UK /riˈzʌlt in/
- Phrasal Verb
- To cause or produce as a consequence.
separate
US /'sepəreɪt/
UK /'sepəreɪt/
- Adjective
- Being different from or unrelated to another
- Not connected; different.
- Transitive Verb
- To divide two things by being in between them
- To move things away from each other
A2TOEICMoresperm
US /spə:m/
UK /spɜ:m/
- Noun (Countable/Uncountable)
- Cell produced by men and needed for reproduction
C2Moresplit
US /splɪt/
UK /splɪt/
- Adjective
- No longer married or in a relationship
- (Injured) by cutting it open, as in someone's lip
- Verb (Transitive/Intransitive)
- To become divided or broken along a straight line
- To cause a cut in (lip, etc.)
A2Moretricky
US /ˈtrɪki/
UK /'trɪkɪ/
- Adjective
- Difficult, so needing skill to do or deal with
- Likely to use tricks; dishonest or deceptive
A2Moreunique
US /juˈnik/
UK /jʊ'ni:k/
- Adjective
- Unlike other things; being the only one like it
- Remarkably special or unusual.
A2TOEICMoreused 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
A1Morevariety
US /vəˈraɪɪti/
UK /və'raɪətɪ/
- Noun
- Particular type of thing or person
- The quality or state of being different or diverse; the absence of uniformity, sameness, or monotony.
A2TOEICMore
Vocabulary
- have to: Must do
- in pairs: Divided into or working as two people together.
- genetic information: Hereditary information encoded in the genetic material (DNA or RNA) of an organism.
- in the middle of: In the central part or point of something.
- used to: Did regularly before, but don't do now
- out of the way: Remote; isolated.
- on and off: Intermittently; not continuously.
- move into: To start living in a new house or building
- instead of: When one thing is replaced by another
- on to: Toward something; forward
- in mind: Being aware of or considering something.
- for example: As an illustration or instance.
- lead to: To result in some action
- add on: To attach or include something extra.
- end up with: To have something as a result.
- result in: To cause or produce as a consequence.
- eventually: After a long time; after many attempts; in the end
- process: To organize and use data in a computer
- physical: Health check at the doctors' or hospital
- description: Explanation of what something is like, looks like
- tricky: Difficult, so needing skill to do or deal with
- completely: In every way or as much as possible
- develop: To explain something in steps and in detail
- split: No longer married or in a relationship
- variety: Particular type of thing or person
- express: To send something by fast mail
- unique: Unlike other things; being the only one like it
- contribute: To be a factor in causing something to happen
- separate: Being different from or unrelated to another
- divide: To split numbers by another number, e.g. 6 / 2 = 3
- occur: To come to pass or to happen
- mention: To refer to or talk or write about something
- generally: Usually; as a rule; by, to or for most people
- genetic: Of, relating to, or controlled by genes
- primary: Most important, most basic or essential
- form: Sports team or person's current winning record
- involve: To have or be included as a part of something
- identical: The same in every way
- pretty: Being attractive to the eye in a simple way
- mind: To be bothered or upset by something
- stage: To organize an event to gain public interest
- duplicate: Something that is the exact same thing as another
- receive: To get something someone has given or sent to you
- notice: To become aware by sight, touch, or hearing
- lot: What happens to a person in life from chance; fate
- biological: Being related to life and living things
- reduction: Act of making something smaller
- important: Having power or authority
- genetically: Caused or controlled, or by genes
- division: How many times a number is contained in another
- sperm: Cell produced by men and needed for reproduction
- information: Collection of facts and details about something
- stand: To be a candidate in an election
- middle: Place that is halfway between two things
- step: Movement done as part of a particular dance
- chromosome: Cell structures that carry the genetic material
- nucleus: Center of an atom
- polar: Concerning the areas near the North or South poles
- gene: Part of cell controlling development of a thing
- fertilize: To make pregnant; to put sperm in an egg
- dna: Chemical in living cells with genetic information
- amoeba: Tiny organism consisting of only one cell
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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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80
Meiosis (UPDATED 2026)
0
林宜悉 posted on 2026/10/01Ever wondered why siblings from the same parents can look so different? This video breaks down the fascinating process of meiosis, explaining how it creates genetic variety through steps like crossing over and reduction division. You'll pick up key terms like 'gametes' and 'homologous chromosomes' while understanding the science behind our unique traits!
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