Moreover, in some cases a pilot might wish to do the opposite and promote turbulent flow-for example, when slowing down.

此外，相反，在某些情况下飞行员更愿意产生紊流——例如，减速时。

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As a soccer ball slows down after it's kicked in the air, the air flow around it changes from turbulent to smooth.

当球在空中速度减慢时，周围的气流从湍流变为稳定的层流。

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The flow of air over the surface of the ball was turbulent, which gave the ball a relatively low amount of drag.

球的表面流动的空气形成湍流，这使得球的阻力相对较低。

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But when it comes to using the turbulent flow of liquid metal rather than well-behaved cables and wires, the experiment becomes rather harder.

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The turbulent flow of water creates undulations in the bed sediments - a series of ripples or dunes that slowly migrate in the direction of the water current.

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