二叠纪大灭绝（Permian extinction）可以说是 地球 历史中最具破坏性的环境灾难事件，这次生物灭绝事件发生在大约距今2.5亿年前的二叠纪末，在这次事件中，超过70%的...
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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.
只有2亿5000万年前史上空前的二叠纪大灭绝盖过这次灭绝。
The die-off was surpassed only by the gargantuan Permian extinction 250 million years ago.
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.
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