The asteroid strike had allowed the mammals to go from lowly underdogs... 小行星撞击 使哺乳动物从卑微的弱者…
The asteroid had inflicted devastating losses on the mammals... 小行星碰撞 对哺乳动物造成毁灭性的打击
Other survivors of the asteroid had also been evolving. 小行星撞击的其它幸存者也在进化
descendants of lizards that survived the asteroid. 小行星撞击之后 幸存的蜥蜴后代
And in early South America, 46 million years after the asteroid, 在早期的南美 小行星撞击的4600万年后
The asteroid had wiped out three-quarters of all Earth's plant and animal species. 小行星 令地球上四分之三的动植物物种灭绝
But just five million years after the asteroid, 但是在小行星撞击之后仅500万年
Like those that evolved after the asteroid... 像小行星撞击后进化出的鸟类一样