He added that, since these ancient feathers didn't aid flight, they likely served for purposes of animal communication, mating, and warmth.

他补充道，远古时期的羽毛并不用于飞翔，而是起到与其他动物沟通、求偶及取暖的作用。

youdao

He added that, since these ancient feathers didn't aid flight, they likely served for purposes of animal communication, mating, and warmth.

他补充道，远古时期的羽毛并不用于飞翔，而是起到与其他动物沟通、求偶及取暖的作用。

youdao