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    constant

    US /ˈkɑnstənt/

    UK /'kɒnstənt/

    • Adjective
    • Happening frequently or without pause
    • Remaining the same over time or not changing.
    • Noun
    • Thing that happens always or at a regular rate
    • A physical quantity that is believed to have a fixed value and is used in calculations.
    A2TOEIC
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    force

    US /fɔrs, fors/

    UK /fɔ:s/

    • Noun
    • Group of persons trained for military action; army
    • Pressure; attraction
    • Transitive Verb
    • To use physical strength or violence to persuade
    • To break open (something) using force.
    rate

    US /ret/

    UK /reɪt/

    • Transitive Verb
    • To assess something or consider its qualities
    • Noun (Countable/Uncountable)
    • Current price or cost of something
    • Speed or frequency of events over time
    A1TOEIC
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    science

    US /ˈsaɪəns/

    UK /'saɪəns/

    • Uncountable Noun
    • Study of the physical world, based on facts
    A2TOEIC
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