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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或者它们能潜入到冰层下面，然后结冰时就进入‘冬眠’，等需要它们到我们无以到达的区域进行研究时，它们再开始活动。

Or [are] able to go beneath the ice, and then to hibernate as the ices closes in, until we need them to carry out their research in areas which we cannot reach.

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