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

所以致命错误是非常大的问题。

So fatal errors are a pretty big deal.

youdao

每天有五名患者被确诊患上恶性黑色素瘤，这是一种致命疾病，在英国比澳大利亚影响还要大。

Five people a day are diagnosed with malignant melanomas. It is a killer and affects more people here than in Australia.

youdao