⊙、你怎么这么笨啊你，以后遇到什么事要站在我后面，知道不？

Why are you so stupid you, later what things to stand behind me, you know what?

youdao

你怎么会这么笨？

How can you be so dense?

《牛津词典》

在德国，准时赴约已经够危险的了，因为你的东道主可能已经在那里等了，好奇你怎么会这么笨。

In Germany, being on time is risky enough because your hosts will probably already be there waiting, wondering how on earth you could be so stupid.

youdao