left Africa millions of years earlier 在数百万年前离开非洲
as it has done for millions of years. 几百万年来一直如此
A supersense honed over millions of years of foraging in the darkness. 这是在数百万年夜间觅食的过程中 磨练出来的超凡感官
Over tens of millions of years, its ancestors repurposed their wings, 经过数千万年 它们的祖先改变了翅膀的用途
Australia had been heading north for millions of years. 澳大利亚已经向北漂移了数百万年
just as birds did millions of years ago. 就像数百万年前的鸟类那样
has been raging for millions of years... 已经持续了数百万年