Most of these locations have waterfalls, which create thin fog in the air.

多数这些地方都有瀑布，瀑布使空气中产生薄雾。

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It was an extremely cold winter's evening and freezing fog hung in the air.

那是一个极其寒冷的冬天的夜晚，空气中弥漫着冰冷的雾。

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Hence it is understood now, that the particles of water in the air form fog, or, which is the same, clouds, so soon as they come into a colder stratum.

现在我们知道了，空气中雾或者云都是同样的东西，都是空气中的水分突然遇冷以后呈现的状态。

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The U.S. Environmental Protection Agency has singled out the greater Salt Lake region as having the nation's worst air for much of January, when an icy fog smothers mountain valleys for days or weeks at a time and traps lung-busting soot.

NPR: Sickening Fog Settles Over Salt Lake City Area

The dense fog has also been causing travel chaos, with air and rail traffic severely disrupted.

BBC: Delhi shivers on coldest day for 44 years

With the fog descending over Fir Park, Jutkiewicz cleared the air with an early effort from 20 yards out, but Loovens blocked.

BBC: Georgios Samaras