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frontier /ˌfrʌnˈtiɚ/  /Brit ˈfrʌntɪə/

  • noun
    plural -tiers
    [count] a border between two countries
    the frontier between Canada and the U.S.
    a distant area where few people live
    frontier life
    the limits of knowledge in a particular field - usually plural

    * Các từ tương tự:
    frontiersman