单词	plane angle
释义	plane angle noun : an angle that for a given dihedral angle is formed by two intersecting lines each of which lies on a face of the dihedral angle and is perpendicular to the edge of the face Word History First Known Use 1570, in the meaning defined above
随便看	chumming up chummy chump chump change chump chop chumpa chumped chumping chumps chumpy chums chums up chumship chumships Chun Doo-Hwan chun-ko-erh p'en-ti chunam Chuncho chunchos chundered chundering chunders chunga chungae chungas

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