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hypersonic 音標拼音: [h,ɑɪpɚs'ɑnɪk] a. 極超音速的,遠超過音速的 極超音速的,遠超過音速的 hypersonic \hy`per*son"ic\, n. [Pref. hyper- sonic.]
(Aeronautics) Pertaining to or moving at a speed greatly in excess of the speed of sound, usually meaning greater than mach 5. All speeds in excess of the speed of sound are {supersonic}, but to be hypersonic requires even higher speed. [PJC]
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