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    constant

    US /ˈkɑnstənt/

    UK /'kɒnstənt/

    • Adjective
    • Happening frequently or without pause
    • Remaining the same over time or not changing.
    • Noun
    • Thing that happens always or at a regular rate
    • A physical quantity that is believed to have a fixed value and is used in calculations.
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    demonstrate

    US /ˈdɛmənˌstret/

    UK /'demənstreɪt/

    • Verb (Transitive/Intransitive)
    • To display a feeling or ability openly
    • To protest about something often as a group
    A2TOEIC
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    progress

    US /ˈprɑɡˌrɛs, -rəs, ˈproˌɡrɛs/

    UK /'prəʊɡres/

    • Verb (Transitive/Intransitive)
    • To move forward or toward a place or goal
    • To make progress; develop or improve.
    • Uncountable Noun
    • Act of moving forward
    • The process of improving or developing something over a period of time.
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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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