Consists of four Chambers with one-way doors (valves) between to direct the blood to flow in a specific direction.

包含四个带有多个单方向“闸门”(瓣膜)的腔体。瓣膜的作用是引导血液流向一个特定的方向。

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His heart has divided into four Chambers and its valves are beginning to form.

他的心脏已经分成了四个腔室，瓣膜也开始形成了。

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These valves have four or five pipe connections, commonly called ports.

这些阀门有四个或五个管道连接，通常称为端口。

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Hot Springs National Park officials closed the valves to spigots at four public access points, where the 143-degree mineral water normally flows.

CNN: Shutdown touches many lives across U.S.

Ford's first attempt at a genuine four-wheel vehicle, which he called the Quadricycle, used valves adapted from a steam engine and didn't have a reverse gear.

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All four froze, but they beat the blaze and thawed the frozen pumps, valves and fittings with propane heaters.

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