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来源:雅诚德英语网
Because they were bipedal, their arms were free to evolve flapping flight, which cannot be said for other reptiles of their time.
因为它们是两足动物,它们的手臂可以自由地进化出拍打的翅膀,这在当时的爬行动物中是不可能的。
Because they were bipedal, their arms were free to evolve flapping flight, which cannot be said for other reptiles of their time.
因为它们是两足动物,它们的手臂可以自由地进化出拍打的翅膀,这在当时的爬行动物中是不可能的。