病原体始终在进化，使免疫系统失去辨认它们的能力。

Pathogens continually evolve, confounding the ability of the immune system to recognize them.

youdao

病原体始终在进化，使免疫系统失去辨认它们的能力。

Pathogens continually evolve, confounding the ability of the immune system to recognize them.

youdao