简而言之，羽毛的进化史是伴随着飞行的进化同时发生的。

In short, the evolution of feathers would have happened along with the evolution of flight.

youdao

简而言之，羽毛的进化史是伴随着飞行的进化同时发生的。

In short, the evolution of feathers would have happened along with the evolution of flight.

youdao