他们想得到的是下雪时天候状况和所下的雪含水量的相关性。
What they were looking for was a correlation between the weather conditions at the time of a snowfall and the amount of water in the snow that fell.
如果含水量达到饱和状态的空气遇到了非常冷的另一团空气，空气中的原先呈雾状的水分就开始凝结变成小的雪粒。
If a stratum of air saturated with moisture meets a very cold one, the fog begins to freeze, and becomes specks of snow.
土季节冻结和融化的影响因素主要有雪盖、植被、土壤成分及含水量、地表状况和地形等。
The factors that can influence the soil seasonal free zing and thawing include snow -cover, vegetation, the soil component and contain water, the condition of earth, landform and so on.
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