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TOEFL IELTS BNC: 5127 COCA: 5952
valve
noun [C] /vælv/
singularvalve
pluralvalves
  1. 1
    the part of a machine or piece of equipment that opens and closes in order to control the flow of air or liquid (机器或设备上的)阀,活门
     Synonyms and related words
  2. 2
    the part of an organ or tube in your body that opens and closes to keep liquid flowing in the right direction (身体器官或管道的)瓣,瓣膜

    heart valves 心脏瓣膜

     Synonyms and related words
    General regions and organs inside the body: apparatus, canal, cavity...
  3. 3
    music the part of some musical instruments that opens and closes to change the sound of the note (一些乐器上的)活塞
     Synonyms and related words
    Parts of musical instruments: bellows, bow, bridge...

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