An example of macroevolution is the appearance of feathers during the evolution of birds from theropod dinosaurs.
化的一个例子是鸟类在从兽角亚目的恐龙化期间羽毛的。
An example of macroevolution is the appearance of feathers during the evolution of birds from theropod dinosaurs.
化的一个例子是鸟类在从兽角亚目的恐龙化期间羽毛的。
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