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.
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。
The problem is that much of that refreezing creates a relatively thin layer of so-called first-year ice.
问题是，重新冻结的冰很大程度上相对较薄，所以被称为“首年冰”。
In 2000 he extracted deep cylinders of ice from Kilimanjaro's glaciers and found that the higher layers were full of elongated bubbles - signs that melting and refreezing had occurred in recent years.
2000年，他曾用柱体容器从乞力马扎罗山的冰川层深部提取了部分冰块，发现冰块上层充满了细长的气泡，证明在最近那几年冰层曾今融化并重新冻结。
But fluid expansion of core resulted from refreezing can destroy pore structure of core, make physical parameters before and after refreezing change.
但冷冻所引起的流体膨胀，会破坏岩心的孔隙结构，使冷冻前后岩石物性参数发生变化。
But fluid expansion of core resulted from refreezing can destroy pore structure of core, make physical parameters before and after refreezing change.
但冷冻所引起的流体膨胀，会破坏岩心的孔隙结构，使冷冻前后岩石物性参数发生变化。
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