em·bou·chure /ˈɑmbʊˌʃʊr, ˌɑmbʊˈ/
  河口;管樂器之吹奏口
  Em·bou·chure n.
  1. The mouth of a river; also, the mouth of a cannon.
  2. Mus. (a) The mouthpiece of a wind instrument. (b) The shaping of the lips to the mouthpiece; as, a flute player has a good embouchure.
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  embouchure
       n : the aperture of a wind instrument into which the player
           blows directly [syn: mouthpiece]