The valve has jammed shut.

阀门给卡住了打不开。

《牛津词典》

The valve failing closed could be due to an internal blockage or failure.

阀门无法关闭的原因可能是内部堵塞或故障。

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But if you touch the valve going into your tire which basically measures the temperature of the air going into your tire, that is getting hot, right.

以至于浑身发热,如果你摸气筒的阀门,相当于近似测量了进入轮胎的气体的温度，它会很热，对吧。

麻省理工公开课 - 热力学与动力学课程节选

Lastly, up here, is a picture of a much smaller device, this is actually an artificial heart valve that is made of plastics and metal and can replace the valve inside your heart.

最后,在上面这里,这张图片是一个相对较小的装置,这实际上是一个人工心脏瓣膜,由塑料和金属制成,可以取代人的心脏瓣膜

耶鲁公开课 - 生物医学工程探索课程节选

So the Joule free expansion involves opening this valve and asking what happens when this gas moves into the other bulb or distributes between the two.

焦耳自由膨胀就是,打开阀门后的过程,气体从一个腔跑到另一个腔,并在它们之间平均分配。

麻省理工公开课 - 热力学与动力学课程节选

Once in the proper place the new valve can be deployed, pushing the older valve aside.

FORBES: Breakthrough Heart Valves: How Will Patients Decide?

The new technology of the early 1800s that produced the valve horn also made possible the valve trumpet.

NPR: Young Tuba Player Gets Nod from Phila. Orchestra

In Europe, not only is the valve on the market, it is already in a newer iteration with a thinner.

FORBES: New Heart Valves Prove We're Living In The Future