单词	direction angle
释义	direction angle noun : an angle made by a given line with an axis of reference specifically : such an angle made by a straight line with the three axes of a rectangular Cartesian coordinate system —usually used in plural Word History First Known Use 1882, in the meaning defined above
随便看	Ephete ephi ephialtes ephippia ephippial Ephippidae ephippidaes ephippiorhynchi ephippiorhynchuses ephippiorhynchusses ephippium ephod ephods ephor ephoralties ephoralty ephorate ephorates ephors ephraim Ephraim Ephraimite ephraimites Ephraimitic Ephrata

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