Tornadoes are whirling, vertical air columns that form from thunderstorms and stretch to the ground.

龙卷风是旋转的垂直气柱， 由雷暴形成并延伸到地面。

The sound of a wind instrument comes from the vibration of an air column in an almost closed cavity pierced with narrow slits that allow notes to be produced.

管乐器的声音来自于在几乎封闭的腔室内气柱挤过能够产生特定音符的缝隙而产生的振动。

You have infrared and microwave sounders, which together can give you information about how much moisture there is in the air columns from the surface of the planet all the way to the top of the atmosphere.

有红外线和微波探测仪，它们一起可以提供从行星表面一直到大气顶部的气柱中水分含量的信息。