And the disease will spread from country to country so fast that you won't know what hit you.

而且这种疾病会从一个国家传播到另一个国家，速度如此之快，以至于你不知道是什么击中了你。

That's related to this verb " to snatch." Amanda says, " He" – meaning Evan – " won't know what hit him." The expression " to not know what hit you" is to be completely surprised by something, usually something bad, something negative.

这与动词“to snatch” 有关。 阿曼达说，“他”——意思是埃文——“不知道是什么击中了他。 ” “不知道是什么击中了你” 这个表达是指对某事感到完全惊讶，通常是某事不好， 消极的东西。