... asteroid n. 小行星 The Permian extinction 二叠纪物种灭绝 1.A 问题问的是：为什么远古的火山爆发比近期的火山爆发破坏性更大?第一段是这么说的：古代的火山更具破坏力，不是因为它们更大，而是因为它们释放出的二氧化碳更能容易地毁灭生命。 ...
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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.
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