In the past 30 years, fall snow cover has increased in the Northern Hemisphere, but spring snow cover has decreased.

图像由美国密歇根大学的科学家马克·弗兰纳绘制，他表示在过去的30年里，北半球降雪量虽然增加，但是春季降雪量却在下降。

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Large flakes of snow began swiftly to fall.

大片大片的雪花开始飞快地落下。

《柯林斯英汉双解大词典》

One night there was a heavy fall of snow.

一天晚上天降大雪。

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When melting snow crystals or raindrops fall through very cold air, they freeze to form small particles of ice,called sleet.

VOA: special.2010.01.05

And it's dangerous. People slip and fall on the snow because it's made of ice.

这样也很危险，人们会在雪上滑倒，因为雪里面都是冰。

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When melting snow-crystals or raindrops fall through very cold air, they freeze to form small particles of ice, called sleet.

VOA: special.2011.01.11

The band of snow will be followed by some showers which may fall as snow on higher ground, he added.

BBC: Snow delays on the M77 in Scotland

As a result, there is a potential for a large fall of snow.

BBC: Snow and sleet forecast for Northern Ireland

There had been a fresh fall of snow the night before, and the fences and trees stood out black against it.

NEWYORKER: She��s the One