[ 复数 sphincters ]
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同义词: anatomical sphincter sphincter muscle
以上来源于: WordNet
N-COUNT A sphincter is a ring of muscle that surrounds an opening to the body and that can tighten to close this opening. 括约肌 [技术]
...the anal sphincter.
...肛门括约肌。
anal sphincter 肛门括约肌;肛管括约肌
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