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》

The wind blew the kite high into the air.

风把风筝吹得高高的。

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The wind blew the money into the air and it fell all over the street.

风把钱吹到空中，掉得街上到处都是。

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Warm air rising from below causes the wind tube to reach toward the ground.

VOA: special.2010.05.11

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

While temperatures were down a bit Wednesday, high-based thunderstorms will be fed by rising air, wind and low humidity, he said.

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However, the energy extracted from thin air by these wind farms could well be worth billions, and create thousands of new jobs in the Commonwealth.

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Those characteristics can include a brief dip in air pressure, a change in wind direction, a change in wind speed, a rise in air temperature or a dip in ultraviolet light reaching the rover.

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