Permian

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First, that there was not one mass extinction at the end of the Permian, but several.
其一，在二叠纪末期，并非仅有一次灭绝事件，而是几次。
Although not one of the "big five" mass extinctions, the mid-Permian extinction has long been considered an important, if puzzling, event.
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。
A few of the CTAM staff organized a day trip to the mountains of the Queen Alexandra Range east of camp to look at the Glossopteris fossils preserved in the Permian sediments exposed there.
几位CTAM营地的工作人员安排了为期一天的行程，到营地东侧的亚历山德拉皇后山脉露营并勘察暴露在外的二叠纪沉积岩中的舌羊齿化石。

He played a season at the University of Texas-Permian Basin, where his stepbrother was a pitcher.
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Permian Basin Royalty Trust shares are currently trading off about 3% on the day.
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In February 2012, it sold its remaining Permian Basin assets to Concho Resources Inc.
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from or referring to the period of time between about 290 and 250 million years ago, in which large reptiles and amphibians appeared, and that ended with most species on earth becoming extinct (= dying out completely)

of, denoting, or formed in the last period of the Palaeozoic era, between the Carboniferous and Triassic periods, which lasted for 60000000 years
the Permian period or rock system

二叠纪
The end-Permian Mass Extinction is the greatest and the most influencing event on biotic evolutionary history. Jin et al.
二叠纪末期爆发的生物集群绝灭是生物演化史上规模最大、影响最深远的事件。
环境科学技术
二叠纪