Excessive valve-stem clearance speeds up valve deposits.

气门杆间隙过大会加速气门的积炭。

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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。

《牛津词典》

Heartburn also know as acid reflux is caused by progesterone relaxing the valve separating the esophagus from the stomach allowing acids to seep up the pipe.

胃灼热，同时也被叫做胃酸倒流，这是因为黄体酮使瓣膜松弛把食道和胃分开了，这会让胃酸渗到食管里。

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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

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Maybe the Oculus Rift and Google Glasses and the next Kinect and whatever Valve cooks up will be awesome.

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Doug Suttles, the chief operating officer for exploration and production at BP, said it had not yet given up on engaging the valve, but was considering other possible solutions.

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He said that one of the problems with fen-phen, a diet drug combo that wound up causing heart-valve problems, was that doctors were too eager to hand them out.

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