Take an empty two-liter soda bottle, wash it out, fill it with water, screw the lid on tightly and set it into your toilet tank, as far away from the flapper valve as possible.

拿一个两升的空汽水瓶，洗干净，装满水，旋紧盖子，放进马桶的水箱里，离舌形阀越远越好。

youdao

Fluid design, in the cover of the battery set a one-way valve.

液设计，在电池的上盖中设置了一个单向的安全阀。

youdao

According to this method of multi-polar set dynamic balancing valve design concept is wrong.

而按照这一方法多极设置动态平衡阀设计概念是不对的。

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In order to stop flood waters overwhelming central London and to save the massive expense of building fresh flood walls and defences, some land could be set aside to act as a safety valve, catching flood waters and storing them until the danger has passed.

BBC: London's drowning

Nothing's set in stone, of course, and Valve's still very much in the exploratory phase of its Steambox push.

ENGADGET

In writing the law, Congress included a safety valve and told the EPA to set the mandate to meet "the projected volume available" in the event of a shortfall.

WSJ: Review & Outlook: Zero Dark Ethanol