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.

youdao

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.

youdao