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valve
级别   第6级
音标   [ vælv ]
解释   n.阀,阀门,电子管
英英释义   a device which opens and closes to control the flow of liquids or gases , or a similar structure in the heart and the veins , which controls the flow of blood
发音   play.gif
例句   1. The exhaust valve on my car has burnt out. 我汽车上的排气阀烧掉了。
  2. The connecting rod may drive a valve stem directly. 连杆可以直接带动阀门的把柄。
 

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