What happens is that the ice at the base of the glacier is under a great deal of pressure—the pressure coming from the weight of the overlying ice.
实际情况是，冰川底部的冰承受着巨大的压力——这些压力来自于覆盖在上面的冰的重量。
2
With additional time, pressure, and refrozen meltwater from above, the small firn granules become larger, interlocked crystals of blue glacial ice.
随着时间的推移，压力的增加，再加上从上方重新冻结的融水，小冰原颗粒成为相互锁结的大晶体蓝色冰川冰。
3
A surplus allows snow to accumulate and for the pressure of snow accumulated over the years to transform buried snow into glacial ice with a depth great enough for the ice to flow.