Worst of all, we have driven the rate of biological extinction, the permanent loss of species, up several hundred times beyond its historical levels, and are threatened with the loss of a majority of all species by the end of the 21st century."
最糟糕的是，我们以超过历史水平百倍的速度加快了生物绝灭，永久地失去物种，在二十一世纪末威胁到所有主要物种的生存。