Any school kid can tell you that comets are made of ice. That frozen water burning off is what gives comets their characteristic tails.
2
欢乐，是一团熊熊燃烧的火焰，它轻而易举地溶化了冰，使我们心中又点亮一盏明灯，照亮前进的道路。
Joy, is a mass of burning flame, which easily melted ice, so that our hearts again lit a beacon, lighting the way forward.
3
雪冰中碳黑记录的研究可以追溯历史时期生物量燃烧的信息， 以及为人类活动污染物的排放研究提供线索。
Therefore, the black carbon concentration in ice core samples can provide valuable information concerning the biomass burning and anthropogenic activity.
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