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    effective

    US /ɪˈfɛktɪv/

    UK /ɪˈfektɪv/

    • Adjective
    • Working efficiently to produce a desired result
    • In operation; in force.
    A1TOEIC
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    version

    US /ˈvɚʒən, -ʃən/

    UK /ˈvə:ʃən/

    • Noun
    • Different way that someone interprets something
    • New or different form of something
    A2TOEIC
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    encourage

    US /ɛnˈkɚrɪdʒ, -ˈkʌr-/

    UK /ɪn'kʌrɪdʒ/

    • Transitive Verb
    • To increase the chance of something happening
    • To make someone more determined or confident
    A2TOEIC
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    vaccine

    US /vækˈsin,ˈvækˌsin/

    UK /'væksi:n/

    • Noun (Countable/Uncountable)
    • Shot using weak disease cells to stop same disease
    • A preparation of weakened or killed microorganisms, or of antigenic proteins derived from them, used to induce protective immunity in animals.
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