Wind is a current of air caused by a vacuum caused by hot air rising.

风是由热空气上升产生真空而引起的空气流动。

《柯林斯英汉双解大词典》

To expel a current of air, AS from the mouth or from a bellows.

从嘴或风箱中往外送气。

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It went way up above the clouds, so far that a current of air struck it and carried it many, many miles away.

轻气球浮荡在云上面，空中的一种气流，向那老远的地方推动着它，把它带走了许多许多里路。

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But he says, it's because of current wind patterns that the volcano is having such a major affect on European air travel.

VOA: standard.2010.04.16

"A current of moving air moves a weak little old mosquito far and wide, " he said.

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From that point, a guide leads you on foot through the smaller chambers and here, you can feel the walls pressing in on you, although there is a current of fresh air all about.

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The Hailstorm II pairs an advanced liquid cooling system with a blustery current of cold air driven by three front intake fans and a large rear exhaust fan.

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