Whales carefully conserve their oxygen when underwater in a couple of ways.

鲸鱼在水下以几种方式小心地保存它们的氧气。

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When underwater, the animals pushed water past their gills while simultaneously pushing the glottis down.

当处于水下时，动物会把水推入到腮里，同时也把声门关闭了。

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During the welding process, when underwater welding power outputs high level, the system stops feeding wires and wires burn upwards with forming molten droplets.

在水下焊接过程中，脉冲电源输出高电平时，停止送丝，电弧稳定燃烧并形成熔滴；

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When Sandy leaves her house, she wears an astronaut's suit so she can breathe underwater.

VOA: special.2009.08.21

The two principal reasons were that generators used for backup power cannot run when underwater, and many of the wired lines carrying signals from the towers to the networks were knocked out by wind and trees.

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We have individuals who when it's zero visibility like that, they will actually close their eyes because the eyes do nothing underwater when you can't see anyway.

NPR: River Poses Hazard for Dive Teams

The irony beyond the historical reality that many investors were ultimately caught underwater when technology shares sagged, is that prudent investment advisors were telling clients all along to look at stocks the way they would look at their house.

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