alpha
US /'ælfə/
UK /ˈælfə/
- Noun
- First letter in the Greek alphabet
- Adjective
- Most powerful (animals of the same sex)
B1Moreantimatter
US /ˈæntɪˌmætɚ, ˈæntaɪ-/
UK /ˈæntimætə(r)/
- Uncountable Noun
- Matter consisting of elementary antiparticles
C2Moreastronaut
US /ˈæstrəˌnɔt/
UK /ˈæstrənɔ:t/
- Countable Noun
- Person who travels in space
B2Morechallenge
US /ˈtʃæləndʒ/
UK /'tʃælɪndʒ/
- Noun (Countable/Uncountable)
- An activity you wish to try that may be hard to do
- Act of formally inviting someone to compete
- Transitive Verb
- To formally invite someone to compete at something
- To question the correctness of something
A2Morechemical
US /ˈkɛmɪkəl/
UK /ˈkemɪkl/
- Noun (Countable/Uncountable)
- Basic substance produced by mixing elements
- The branch of science concerned with the substances of which matter is composed, the investigation of their properties and reactions, and the use of such reactions to form new substances.
- Adjective
- Made of various elements
A2Morecommitment
US /kəˈmɪtmənt/
UK /kə'mɪtmənt/
- Noun
- Permanent love or concern for person, thing
- Promise or decision to do something for a purpose
A2Moredistance
US /ˈdɪstəns/
UK /'dɪstəns/
- Uncountable Noun
- Lack of friendliness toward another person
- Noun (Countable/Uncountable)
- Amount of space between two places or things
- A point or place that is far away.
A2Moreendeavor
US /ɛnˈdɛvɚ/
UK /en'devə/
- Verb (Transitive/Intransitive)
- To attempt or make effort to do something
- Noun (Countable/Uncountable)
- An attempt or effort
B2TOEICMoreenergy
US /ˈɛnədʒi/
UK /'enədʒɪ/
- Noun (Countable/Uncountable)
- Physical or mental strength
- Enthusiasm and determination.
A2Moreengineering
US /ˌendʒɪˈnɪrɪŋ/
UK /ˌendʒɪˈnɪərɪŋ/
- Uncountable Noun
- The practical application of science to industry
B1Moreenterprise
US /ˈentərpraɪz/
UK /ˈentəpraɪz/
- Noun (Countable/Uncountable)
- A business or organization
- Task often considered difficult or challenging
A2TOEICMorefission
US /ˈfɪʃən/
UK /ˈfɪʃn/
- Noun
- Form of nuclear energy where particles combine
C1TOEICMorefriction
US /ˈfrɪkʃən/
UK /ˈfrɪkʃn/
- Uncountable Noun
- Disagreement between two or more people
- Force preventing motion between bodies in contact
B2Morefuel
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
A2TOEICMorefusion
US /ˈfjuʒən/
UK /ˈfju:ʒn/
- Noun (Countable/Uncountable)
- Combining various things to make something new
- The process in which light atomic nuclei combine to form a heavier nucleus, releasing large amounts of energy.
B2Moregram
US /ɡræm/
UK /ɡræm/
- Countable Noun
- Metric unit of weight equal to 1/1000 of a kilo
B1Moreinterstellar
US /ˌɪntərˈstelə(r)/
UK /ˌɪntəˈstelə(r)/
- Adjective
- Being in the space between stars or star systems
C1Morejourney
US /ˈdʒɚni/
UK /'dʒɜ:nɪ/
- Noun
- Act of traveling from one place to another; trip
- Intransitive Verb
- To travel through a place
A2TOEICMoremedical
US /ˈmɛdɪkəl/
UK /ˈmedɪkl/
- Adjective
- Of or relating to physical health or medicine
- Noun
- A health check or test
A2Moremission
US /ˈmɪʃən/
UK /'mɪʃn/
- Noun (Countable/Uncountable)
- A task or role someone is given to do
- Special assignment given to a person or group
B1TOEICMoreorbit
US /ˈɔrbɪt/
UK /'ɔ:bɪt/
- Noun
- Path an object takes as it circles another object
- The sphere of influence or control; range.
- Intransitive Verb
- To go around another object (often in space)
B2Moreoverview
US /ˈoʊvərvju:/
UK /ˈəʊvəvju:/
- Noun (Countable/Uncountable)
- A description of the main points; summary
- A comprehensive inspection or survey.
- Transitive Verb
- To inspect or survey something comprehensively.
B2TOEICMorephysicist
US /ˈfɪzɪsɪst/
UK /ˈfɪzɪsɪst/
- Noun
- Person who studies and works in physics
B2Moreplanet
US /ˈplænɪt/
UK /'plænɪt/
- Noun (Countable/Uncountable)
- One of the bodies that orbit the sun
- A different world or sphere of existence.
- Proper Noun
- The earth.
A2Moreplatform
US /ˈplætˌfɔrm/
UK /'plætfɔ:m/
- Noun (Countable/Uncountable)
- Flat, raised structure that people stand on
- Area from which you board a train at a station
B1Morerocket
US /ˈrɑkɪt/
UK /'rɒkɪt/
- Noun
- Powerful engine that releases hot gases
- Dark green, hot-tasting salad leaf
- Verb (Transitive/Intransitive)
- To travel, increase, or rise very quickly
- To increase very rapidly and suddenly.
B1Moresail
US /sel/
UK /seɪl/
- Intransitive Verb
- To travel across water in a boat or a ship
- To move along quickly and smoothly
- Noun (Countable/Uncountable)
- Trip or journey on a ship
A2Moresatellite
US /ˈsætlˌaɪt/
UK /'sætəlaɪt/
- Noun (Countable/Uncountable)
- Device sent into space that aids communication
- Natural object in space that moves around another
B1Morescience
US /ˈsaɪəns/
UK /'saɪəns/
- Uncountable Noun
- Study of the physical world, based on facts
A2TOEICMoreshuttle
US /ˈʃʌtl/
UK /ˈʃʌtl/
- Noun (Countable/Uncountable)
- Vehicle carrying passengers between two places
- Device used when weaving cloth
- Verb (Transitive/Intransitive)
- To move passengers between two nearby places
B1Moresolar
US /ˈsolɚ/
UK /'səʊlə(r)/
- Adjective
- Concerning the sun, or its heat
B1Morespacecraft
US /ˈspeɪskræft/
UK /ˈspeɪskrɑ:ft/
- Noun
- Vehicle capable of traveling to outer space
- An unmanned probe or satellite designed for space exploration.
C2Morespaceship
US /ˈspesˌʃɪp/
UK /ˈspeɪsʃɪp/
- Noun
- Spacecraft designed to travel into space
C2Morespark
US /spɑrk/
UK /spɑ:k/
- Countable Noun
- Small piece of burning material produced by fire
- Tiny, brief bit of light caused by electric energy
- Intransitive Verb
- To make tiny, brief bits of light
B1Morestuff
US /stʌf/
UK /stʌf/
- Uncountable Noun
- Generic description for things, materials, objects
- Transitive Verb
- To push material inside something, with force
B1Moretear
US /tɛr/
UK /teə(r)/
- Noun (Countable/Uncountable)
- Drop of salty water from the eye
- Hole or rip in something after it has been damaged
- Intransitive Verb
- To move very quickly, often with carelessness
A2Moretechnology
US /tɛkˈnɑlədʒi/
UK /tek'nɒlədʒɪ/
- Uncountable Noun
- Use or knowledge of science in industry etc.
- Machinery and equipment developed from scientific knowledge.
A2TOEICMoretheoretical
US /ˌθiəˈrɛtɪkəl/
UK /ˌθɪəˈretɪkl/
- Adjective
- Concerning the unproved aspects of a subject
- Based on or using the ideas and abstract principles that relate to a subject
B1Moretheoretically
US /ˌθiəˈretɪkli/
UK /ˌθɪə'retɪklɪ/
- Adverb
- As regards ideas that could be true
B2Moretissue
US /ˈtɪʃu/
UK /ˈtɪʃu:/
- Noun (Countable/Uncountable)
- Substance formed by cells of living thing; flesh
- Kind of thin, light paper used to pack objects
A2Moretrek
US /trɛk/
UK /trek/
- Noun
- Slow or difficult journey
- Intransitive Verb
- To make your way slowly and painfully
- To go on a difficult (often walking) journey
B1Moreuniverse
US /ˈjunəˌvɚs/
UK /ˈju:nɪvɜ:s/
- Noun (Countable/Uncountable)
- All of space that contains planets and stars
- Things surrounding a person, affecting their life
B2Morevoyager
US /ˈvɔɪɪdʒɚ/
UK /ˈvɔɪɪdʒə(r)/
- Countable Noun
- Traveler to a distant land (especially by sea)
B1Morewhoa
US /woʊ/
UK /wəʊ/
- Interjection
- Tell someone to do something more slowly
- An exclamation of surprise, amazement, or shock.
C1Morewoo
US /wu/
UK /wu:/
- Transitive Verb
- (Of a man) to try to get a woman to marry him
- To attempt to persuade to do something
C2TOEICMore
Vocabulary
- stuff: Generic description for things, materials, objects
- sort: To organize things by putting them into groups
- commitment: Permanent love or concern for person, thing
- journey: Act of traveling from one place to another; trip
- sense: Certain mental feeling or emotion
- imagine: To think creatively about; form mental picture of
- exist: To be present, alive or real
- fuel: To give power to (a mob, anger, etc.); incite
- universe: All of space that contains planets and stars
- endeavor: To attempt or make effort to do something
- orbit: Path an object takes as it circles another object
- challenge: An activity you wish to try that may be hard to do
- astronaut: Person who travels in space
- planet: One of the bodies that orbit the sun
- spark: Small piece of burning material produced by fire
- distance: Lack of friendliness toward another person
- tissue: Substance formed by cells of living thing; flesh
- theoretically: As regards ideas that could be true
- energy: Physical or mental strength
- platform: Flat, raised structure that people stand on
- satellite: Device sent into space that aids communication
- tear: Drop of salty water from the eye
- chemical: Basic substance produced by mixing elements
- enterprise: A business or organization
- lot: What happens to a person in life from chance; fate
- friction: Disagreement between two or more people
- technology: Use or knowledge of science in industry etc.
- science: Study of the physical world, based on facts
- system: Set of organized, planned ideas that work together
- fact: Something that is known or proved to be true
- mission: A task or role someone is given to do
- fusion: Combining various things to make something new
- public: Owned by the government
- bring: To take or go with someone to a place
- solar: Concerning the sun, or its heat
- medical: Of or relating to physical health or medicine
- question: To ask for or try to get information
- land: Region or country
- space: Empty area kept for a specific reason, like a car
- fast: In a way that is difficult to move or change
- part: Division of a book
- rocket: Powerful engine that releases hot gases
- real: Actually existing or happening, not imagined
- theoretical: Concerning the unproved aspects of a subject
- sail: To travel across water in a boat or a ship
- trek: Slow or difficult journey
- interstellar: Being in the space between stars or star systems
- shuttle: Vehicle carrying passengers between two places
- spacecraft: Vehicle capable of traveling to outer space
- physicist: Person who studies and works in physics
- woo: (Of a man) to try to get a woman to marry him
- overview: A description of the main points; summary
- engineering: The practical application of science to industry
- gram: Metric unit of weight equal to 1/1000 of a kilo
- whoa: Tell someone to do something more slowly
- alpha: First letter in the Greek alphabet
- fission: Form of nuclear energy where particles combine
- spaceship: Spacecraft designed to travel into space
- antimatter: Matter consisting of elementary antiparticles
- voyager: Traveler to a distant land (especially by sea)
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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
Interstellar Space Travel (Full Episode) | Startalk | National Geographic
0
林宜悉 posted on 2026/05/21Ever wondered what it takes to travel to other stars? This episode of Star Talk dives into the incredible challenges and dreams of interstellar travel, featuring insights from astronaut Mae Jemison and physicist Lawrence Krauss. You'll get a fascinating look at the diverse skills needed for space exploration and pick up some great vocabulary about science and engineering along the way!
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