標準元音 biāozhǔnyuányīn cardinal vowel Origin Definitions Defs Strokes Stroke Words Sentences Sents 标准 標準 biāozhǔn noun standard standard; criterion; norm used as a basis for comparison or judgment元音 yuányīn vowel A speech sound produced by the vocal cords vibrating while the air flows through the mouth and throat without being blocked; also called 母音 mǔyīn.