... 二叠纪的 dyassic; permian 二叠纪时期 permian period million years ago 二叠纪粘土 permian clay ...
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Some 250 million years ago, at the end of the time known as the Permian, life was all but wiped out during a sustained period of massive volcanic eruption and devastating global warming.
大约25千万年前，也就是所说的二叠纪的末端时候，经过一系列火山剧烈喷发和毁灭性全球升温，生命几乎消失殆尽。
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。
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