You cannot understand my trouble.

你不可能理解我的烦恼。

youdao

But, pardon me, you cannot understand what I am saying.

但是请原谅，你们是听不懂我说的这些话的。

youdao

If something baffles you, you cannot understand or explain it at all.

如果某事困惑你，你不能明白或者为它作出解释。

youdao

they cannot understand you because you're speaking a different language because you're in a foreign city.

但是他们并不理解你在说什么，因为你在异国他乡，说着他们听不懂的语言。

How long课堂 - SpeakingMax英语口语达人

If you can acknowledge reasonable usage in these contexts, I fail to understand how you cannot extend the same to internet culture.

FORBES: Enders Game, Orson Scott Card, and People who Hide Behind Pen Names

As you can understand, we cannot reveal the details of meetings we have conducted with other congressional clients.

FORBES: CRS Refuses To Disclose Who Requested Withdrawal Of Report On Marginal Rates

Conservative peer Lord Forsyth of Drumlean said: "I cannot understand why you want to write this commitment into statute", arguing that the government needed to be more flexible.

BBC: Economic Affairs Committee