snow是物质名词。物质名词属于不可数名词。物质名词包活液态物质、气态物质、固态物质，如建筑材料、粮食、饮料等。
The road is closed because of the snow.
这条路因下雪而封闭。
Snow is falling all over the country.
全国各地都在下雪。
His red clothes stood out clearly against the snow.
他的红衣服在白雪中格外显眼。
I don't think the snow will settle.
我看这雪积不住。
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