我还没听说过有任何传染病在数十万跨国买药的人中传播蔓延。

I haven't heard of any raging epidemics among the hundreds of thousands of people buying cross border.

youdao

这项工作在保护猫能捕猎的物种方面做出一些阐释，并为阻止猫科传染病的蔓延提供了帮助。

The work should shed light on protecting species that the cats hunt, and inform the efforts to stop the spread of feline contagious diseases.

youdao