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    US /ɪmˈpruv/

    UK /ɪm'pru:v/

    • Verb (Transitive/Intransitive)
    • To make, or become, something better
    A1TOEIC
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    scale

    US /skel/

    UK /skeɪl/

    • Noun (Countable/Uncountable)
    • Size, level, or amount when compared
    • Small hard plates that cover the body of fish
    • Verb (Transitive/Intransitive)
    • To change the size of but keep the proportions
    • To climb something large (e.g. a mountain)
    A2TOEIC
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    sustainable

    US /səˈsteɪnəbl/

    UK /səˈsteɪnəbl/

    • Adjective
    • Capable of continuing for a long time
    • Able to be maintained without running out of
    experiment

    US /ɪkˈspɛrəmənt/

    UK /ɪk'sperɪmənt/

    • Noun (Countable/Uncountable)
    • Test performed to assess new ideas or theories
    • A course of action tentatively adopted without being sure of the eventual outcome.
    • Verb (Transitive/Intransitive)
    • To create and perform tests to research something
    • To try something new that you haven't tried before
    A2TOEIC
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