A bigger mass extinction, at the end of the Permian period 251m years ago, killed 70% of the world's land vertebrates (and 96% of all Marine animals) and paved the way for the age of reptiles.

而更大规模的灭绝发生在25100万年前二叠纪末期，致使世界上70%的陆地脊椎动物(和96%的海洋动物)死亡，同时造就了爬行动物的时代。

youdao

Because fossils are rare and poorly preserved, the exact age of the Permian in the Wenguer area, Artux County, Xinjiang, is still doubtful.

新疆阿图什的温古尔—巴音库鲁提一带二叠系由于化石稀少而且保存不好，地层确切时代仍存在疑问。

youdao

The sedimentary environment of the Early Feixianguan Age of Early Triassic in northeastern Sichuan Basin mainly inherited the pattern of the Late Changhsingian Age of Late Permian.

四川盆地早三叠世飞仙关早期的环境基本上继承了晚二叠世长兴期末的格局。

youdao