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    couple

    US /ˈkʌpəl/

    ・

    UK /'kʌpl/

    • Transitive Verb
    • To join something to something else
    • (Two animals) to engage in sexual relations
    • Noun (Countable/Uncountable)
    • Two people in a romantic relationship
    • Two of something; two people; a pair
    A2
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    hormone

    US /ˈhɔrˌmon/

    ・

    UK /'hɔ:məʊn/

    • Noun
    • Chemical produced by the body to control functions
    B2
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    protein

    US /ˈprəʊˌtiːn/

    ・

    UK /ˈprəʊti:n/

    • Noun (Countable/Uncountable)
    • Group of molecules made from amino acids
    B1
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    molecule

    US /ˈmɑlɪˌkjul/

    ・

    UK /ˈmɒlɪkju:l/

    • Noun
    • Two or more atoms chemically combined
    B2
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    energy point vocabulary