单词 | 环状肌 |
释义 | 〔sphincter〕A ringlike muscle that normally maintains constriction of a body passage or orifice and that relaxes as required by normal physiological functioning.括约肌:一般保持身体管道或通气口的收缩,并能在正常的生理作用下放松的环状肌肉 |
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