When small creatures swim past, they bend the hairs on the bladder, causing a flap to open.

当小生物游过时，它们会弯曲膀胱上的毛发，导致膀胱瓣打开。

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It equalizes the pressure, so you can open the door or swim out the window.

它使得车内外的压力均衡，这样你就能打开车门或者从车窗游出去。

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We came across open water which we had to swim across.

我们还遇到过无冰的水面，我们不得不游着前进。

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They swim with their mouths open, cleaning the water as they move.

VOA: special.2009.06.16

Patten, 21, is no stranger to long distance swimming, having come third in the 10km open water swim and making the final of the 800m freestyle in Beijing.

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The pool I swim in does not open until 6 a.m. and is not available in the evenings or weekends.

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Darker-fleshed fish that swim in cold, open waters, such as tuna, herring, and mackerel, store fat in their flesh and are high in omega-3s.

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