搜尋結果
hypersonic
- IPA[ˌhīpərˈsänik]
美式
- relating to speeds of more than five times the speed of sound (Mach 5).;relating to sound frequencies above about a thousand million hertz.
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- IPA[hʌɪpəˈsɒnɪk]
英式
- relating to speeds of more than five times the speed of sound (Mach 5).
Oxford Dictionary