性状：白色粒状结晶，有醋酸味，易溶于水。
形状：无色粒状结晶，易溶于水和醇，在潮湿空气中易潮解。
Shape: Colorless granular crystal, easily soluble in water and alcohol, easy to deliquescence in moist air.
随着进一步的融化、再结冰，以及上方新的降雪增加的重量，这些雪变成再次结晶阶段的颗粒状中间物，介于小薄片与冰块之间，被称作万年雪。
With further melting, refreezing, and increased weight from newer snowfall above, the snow reaches a granular recrystallized stage intermediate between flakes and ice known as firn.
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