单词	Mach cone
释义	Mach cone noun : the conical pressure wave front produced by a body moving at a speed greater than that of sound Word History Etymology after Ernst Mach
随便看	Gonder Gondi gondies gondis gondola gondolas gondolet gondolier gondolieres gondoliers Gondomar gonds Gondwana gondwanaland gondwanalandes gondwanalands gone gone (away) gone (by) gone (for) gone (on) gone (to) gone against gone along gone around

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