air moving (sometimes with considerable force) from an area of high pressure to an area of low pressure; "trees bent under the fierce winds"; "when there is no wind, row"; "the radioactivity was being swept upwards by the air current and out into the atmosphere" 同义词：wind, current of air,
Air currents can be caused by differences in temperature, pressure, or impurity concentration. Temperature differences can cause air currents because warmer air is less dense than cooler air, causing the warmer air to appear "lighter.
例句与用法
1.
Fantastic flights have also been made with gliders, but these use nature's rising air currents rather than human power . 飞行的幻想当然还可以靠滑翔机来满足，不过滑翔机用天然的上升气流，而不用人的体力。
2.
Brief analysis on test of reversing air current with mine air draft 矿井利用风道反风试验浅析
3.
Faulty air current under the licker in , cylinder & doffer 刺辊、锡林和道夫下的气流流通不好。
4.
Radiating from the earth , heat causes air currents to rise 热量由地球辐射出来时，使得气流上升。
5.
Radiating from [ / url ] earth , heat causes air currents to rise 热量由地球辐射出来时，使得气流上升。
6.
The ground always releases heat , making turbulent air current 地面经常释放热量，造成有湍流的空气流动。
7.
A goose ' s wings churn the air and leave an air current behind 一只大雁的翅膀扇动空气，在身后留下一股气流。
8.
A goose ' s wings churn the air and leave an air current behind 一只大雁的翅膀扇动空气，在身后留下一股气流。
9.
In addition , in order to know the direction of air currents well , we made filament experiment 另外，为了清楚室内气流流向，进行了飘丝实验。
10.
Cause analysis of gas concentration reduction in face air current during reversal mine ventilation 矿井反风时工作面风流中瓦斯浓度降低的原因分析
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