valve
[vælv]
n.
阀;
真空管;
（管乐器的）活栓;
（心脏的）瓣膜;
例句:
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The bag is resealed with a simple twist of the valve.
只需拧一下阀门，气囊就能重新密封。
来自柯林斯例句
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The intake valve was jammed open.
进气阀卡住了，关不上。
来自柯林斯例句
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He replaced a dud valve.
他换掉了坏阀门。
来自柯林斯例句
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He also has pro-blems with a heart valve.
他的一个心瓣也有毛病。
来自柯林斯例句
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Exercise is a good safety valve for the tension that builds up at work.
锻炼身体是排解工作压力的好办法。
来自《权威词典》