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  1. Oxford Dictionary

    subsonic

    • IPA[ˌsʌbˈsɒnɪk]

    英式

    • adj.
      relating to or flying at a speed or speeds less than that of sound
    • 釋義

    形容詞

    • 1. relating to or flying at a speed or speeds less than that of sound subsonic aircraft
    • 更多解釋

    subsonic

    • IPA[ˌsəbˈsänik]

    美式

    • adj.
      relating to or flying at a speed or speeds less than that of sound: subsonic aircraft

    Oxford American Dictionary