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    brain

    US /bren/

    UK /breɪn/

    • Transitive Verb
    • To strike someone forcefully on the head
    • Noun (Countable/Uncountable)
    • The part of the head that thinks
    • A smart person who often makes good decisions
    function

    US /ˈfʌŋkʃən/

    UK /'fʌŋkʃn/

    • Noun
    • Social event, or party such as a wedding
    • Mathematical operation used in calculations
    • Intransitive Verb
    • To serve a certain purpose or role
    • To be operating, working or achieving its purpose
    A2TOEIC
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    barrier

    US /ˈbæriɚ/

    UK /'bærɪə(r)/

    • Noun
    • Difficult situation preventing something happening
    • Structure or object that stops free movement
    B1TOEIC
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    protein

    US /ˈprəʊˌtiːn/

    UK /ˈprəʊti:n/

    • Noun (Countable/Uncountable)
    • Group of molecules made from amino acids
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    energy point vocabulary