积雪密度是指地面积雪层中单位体积内的含水量。
并且为了提供更多的数据参考，本文采用各地区平均积雪密度和新雪密度分别计算出地面雪压和屋面雪压。
And snow pressures on the ground and the coverings of greenhouses are calculated by mean density of snow in an area and new density of snow respectively.
该比率越高，积雪会越干燥和越像粉状(虽然该比率被称为是密度，但是其数字越大代表密度越低)。
The higher the ratio (known, confusingly, as the density, even though bigger Numbers mean the snow is actually less dense), the drier and more powdery the snow.
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