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为什么鸟类作为恐龙的后代，生物学上被分为独立的“鸟纲”而不是蜥形纲蜥臀目下的“鸟亚目”？ 知乎 Template






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tomski为什么鸟类作为恐龙的后代，生物学上被分为独立的“鸟纲”而不是蜥形纲蜥臀目下的“鸟亚目”？ 知乎 coloring
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