Don't you want to know why they are so successful?

你难道不想知道他们为什么这么成功吗？

youdao

Perhaps the reason why so many universities offer their students so little is they know studying at a top university remains a brilliant investment even if you don't learn anything.

也许这么多大学给学生提供的服务太少的原因是：他们知道，即使什么也学不到，在顶尖大学学习仍然是一项明智的投资。

youdao

Don't you know the crushed worm will turn? Why are you so lacking in vigilance?

你不知道困兽犹斗吗？为什么这样麻痹大意？

《新英汉大辞典》

And then as I grew up, you know, I started to appreciate my culture and where they're from and so I decided, like you know, I don't like what's out there, so why don't I try doing something to change it too?

NPR: Rapping About Land and Identity

So, you know, that's one reason why I really don't want to vote for Hillary is the fact that Bill would be riding on her tails again.

NPR: Texas Women Reflect Shift in Political Sentiments