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如果我们有机会坐飞机越过南极上空，将会发现，南极大陆是一个中部隆起的、向四周缓缓倾斜的高原，巨大而深厚的冰层如同一个银铸的大锅盖，倒扣在南极大地上面，所以又称南极冰盖。南极冰盖的厚度相当惊人，平均厚度2000米，最厚的地方有4800米，尤其是在南极冬季降临时，大
If we have the opportunity to fly over Antarctica by air, we will find that the Antarctic continent is a central plateau that rises slowly to the sides. The huge, deep layer of ice is like a silver-coated pot lid, and it is buckled to the south. Above, it is also called the Antarctic ice sheet. The thickness of the Antarctic ice sheet is quite striking, with an average thickness of 2,000 meters, and the thickest part is 4,800 meters, especially during the winter in Antarctica.