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Often extinctions in the ocean occur at the same time as those on land. Then again, the ice age extinctions lost many big animals, but not many sea faring ones.
海洋生物的灭绝常常与陆地生物同时发生。再一次,冰河时代的灭绝使许多大型动物灭绝,但没有多少海洋动物灭绝。
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