This valve regulates the flow of water.

这个阀门调节水流。

《牛津词典》

The stones have been worn smooth by the constant flow of water.

不停的流水把这些石头冲刷得很光滑。

《牛津词典》

While previously the gap between the continents had allowed a free flow of water, now the isthmus presented a barrier that divided the Atlantic Ocean from the Pacific Ocean.

以前，大陆之间的鸿沟允许水自由流动；而现在地峡形成了一道屏障，把大西洋和太平洋分隔开来。

youdao

Project organizers hope to re-create wetlands in Picayune Strand and nearby lands by redirecting the flow of water in that area.

VOA: special.2010.09.21

Automatic faucets use an electronic sensor to start and stop the flow of water when people wash their hands.

VOA: special.2011.04.06

You can change the flow of water so that the temperature is hot or warm as desired.

VOA: special.2009.04.20

Power is equal to the flow of water out of the pipe, which depends on both variables.

WSJ: A Youngster's Bright Idea Is Something New Under the Sun; Scientist Is 13-Year-Old Aidan Dwyer

As the craft moves forward, the flow of water over the curved side pulls the wing downward.

FORBES: Cruising Altitude: Minus 400 Feet

Out of that it can then give you a small flow of water at a high pressure.

CNN: Where to store wind-powered energy? Under water!