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南极可怕的极度严寒究竟是怎么形成的？企鹅是只存在于南极吗？它们为什么不怕南极严酷的低温环境？臭氧空洞，冰川融化，海水温度升高，北极熊溺水而死，海象搬家，植物大规模迁徙。 ( How does the terrible extreme cold of the Antarctic form? Are penguins only found in Antarctica? Why are they not afraid of the harsh Antarctic environment? The hole of ozone layer, melting glaciers, rising sea temperatures, drowning polar bears, moving walrus, plant mass migration are described. )
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