例如，发生在两亿五千年前的二叠纪物种灭绝就与西伯利亚的火山爆发发生在同一时期。
The Permian extinction, for example, which happened 250 million years ago, is marked by floods of volcanic rock in Siberia that cover an area roughly the size of western Europe.
随着二叠纪生命形式的衰退，它们达到了一个致命的临界点，物种最终走向了大灭绝。
As Permian life-forms declined, they reached a fatal threshold and species succumbed to mass extinction.
二叠纪大灭绝事件比其他大灭绝事件受到的关注要少得多，因为那时灭绝的大多是我们不熟悉的物种。
The Permian event has attracted much less attention than other mass extinctions because mostly unfamiliar species perished at that time.
尽管不是五次物种大灭绝之一，二叠纪中期的物种灭绝依然被长期作为谜一般的事件受到重点关注。
Although not one of the "big five" mass extinctions, the mid-Permian extinction has long been considered an important, if puzzling, event.
二叠纪的生命大灭绝，是我们这个星球上最可怕的一次物种灭绝，海洋的90%的生命以及陆地上70%的生命都消失了。
The Permian extinction-the worst extinction event in the planet's history-is estimated to have wiped out more than 90 percent of all Marine species and 70 percent of land animals.
二叠纪的生命大灭绝，是我们这个星球上最可怕的一次物种灭绝，海洋的90%的生命以及陆地上70%的生命都消失了。
The Permian extinction—the worst extinction event in the planet\'s history—is estimated to have wiped out more than 90 percent of all marine species and 70 percent of land animals.
二叠纪-三叠纪最严重的大灭绝发生在两亿五千万年以前，杀死了所有物种的95%。
Permian-Triassic The worst mass extinction took place 250m years ago, killing 95% of all species.
二叠纪开始于2.99亿年前，并以地球上最大规模的物种灭绝而结束。
The Permian period, which ended in the largest mass extinction the Earth has ever known, began about 299 million years ago.
二叠纪开始于2.99亿年前，并以地球上最大规模的物种灭绝而结束。
The Permian period, which ended in the largest mass extinction the Earth has ever known, began about 299 million years ago.
应用推荐