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单词 sphincter
释义 sphincter/ˈsfiŋktə/n. Anat. a ring of muscle surrounding and serving to guard or close an opening or tube, esp. the anus 【解】括约肌(尤指肛门括约肌) sphincteral adj. sphincteric /-ˈterik/ adj.[Latin from Greek sphigktēr, from sphiggō ‘bind tight’]
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