DNA evidence has suggested the last common ancestor to eutherians and marsupials lived around 160 million years ago.
DNA证据显示，真兽类和有袋类最后的共同祖先生活在1.6亿年前左右。
DNA evidence has suggested the last common ancestor to eutherians and marsupials lived around 160 million years ago.
DNA证据显示，真兽类和有袋类最后的共同祖先生活在1.6亿年前左右。
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