- This was the planet's third,
这是地球上第三次 - and most devastating, mass extinction.
也是最具毁灭性的大规模灭绝事件 - Ninety percent of all species
90%的物种 - lost forever.
永远消失 - Entire branches torn off the evolutionary tree.
进化树的许多分支完全断裂 - But in the loss of many,
许多物种灭绝了 - endured the few.
但是少数物种幸存下来