Why Glaciers Flow Like Very Slow Rivers — Not Just Slide Downhill
为什么冰川像极慢的河流一样流动,而不仅是沿山坡滑落?
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Glaciers move not just by gravity pulling ice downhill, but also by internal deformation under immense pressure.
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Ice crystals slowly slide past one another when temperatures rise near the melting point, even below zero degrees Celsius.
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