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sphincter
sfɪŋktəʳ ˈsfɪŋktər
Word forms: plural sphincters
N-COUNT 括约肌 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 [technical]
  • ...the anal sphincter.

    肛门括约肌

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sphincter

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