半融雪通过一种未知的物理过程被压实，而固态、无气泡的冰是由富含可溶性有机物的水形成的。
The slush is compacted by an unknown mechanism, and solid, bubble-free ice is formed from water high in soluble organic substances.
美国的那杯水里有冰；法国的那杯装满了气泡水；来自中国的那杯水正冒着热气。
The glass of water from the US has ice; the one from France is full of sparkling water; the one from China is steaming.
冰中俘获的空气泡可以揭示过去的大气条件，所以冰川可以向人们提供环境记录。
Glaciers also provide an environmental record by trapping air bubbles in ice that reveal atmospheric conditions in the past.
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