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    Video vocabulary

    authentic

    US /ɔˈθɛntɪk/

    ・

    UK /ɔ:ˈθentɪk/

    • Adjective
    • From a reliable source; accurate; true
    B1
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    imperative

    US /ɪmˈpɛrətɪv/

    ・

    UK /ɪm'perətɪv/

    • Noun
    • The state of demanding notice or attention
    • Adjective
    • Absolutely necessary; that must be done
    B2TOEIC
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    rehearse

    US /rɪˈhɜ:rs/

    ・

    UK /rɪˈhɜ:s/

    • Verb (Transitive/Intransitive)
    • To practice e.g. play, speech before a performance
    • To say or write again; repeat.
    B1TOEIC
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    mechanism

    US /ˈmɛkəˌnɪzəm/

    ・

    UK /'mekənɪzəm/

    • Noun (Countable/Uncountable)
    • Part of a machine that performs a certain function
    • System or process for achieving a certain result
    B1
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