- Within a few million years,
在几百万年内 - forests had regrown and carpeted much of the land.
森林已重新生长并覆盖大部分陆地 - The climate became hot and wet.
气候变得炎热潮湿 - The perfect conditions for life to flourish.
这是生命蓬勃发展的理想条件 - A world primed for a new wave of evolution.
这个世界 非常适于新一波进化浪潮的掀起 - 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 - yet some of the smaller ones,
但有一些小型哺乳动物