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	mooner mooners mooney mooneye mooneye cisco mooneyes moonfaced moonfish moonfishes moonflight moonflower moonflowers moonglow Moonie moonier moonies mooniest moonilier mooniliest moonily mooniness mooninesses mooning mooning about mooning after

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