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  1. Oxford Dictionary

    inefficacious

    • IPA[ˌɪnɛfɪˈkeɪʃəs]

    英式

    • adj.
      not producing the desired effect
    • 釋義

    形容詞

    • 1. not producing the desired effect social conventions honed over thousands of years were suddenly inefficacious
    • 更多解釋

    inefficacious

    • IPA[ˈinefiˈkāSHəs]

    美式

    • adj.
      not producing the desired effect.

    Oxford American Dictionary