青少年的语言成人往往听不懂。

The language of teenagers is often completely inaccessible to adults.

她讲的东西我一个字都听不懂！

I couldn't understand a single word she said!

我们听不懂他们在讲些什么，因为他们说的是汉语。

We couldn't understand them because they were talking in Chinese.

他们所用的大量行话是外人听不懂的。

A lot of the jargon they use is unintelligible to outsiders.

她已神志不清，听不懂我们向她说的任何话。

She was too far gone to understand anything we said to her.

他们的行话外人听不懂。

Their jargon is impenetrable to an outsider.

我几乎听不懂他所讲的。

I understood little of what he said.

她说这是女生话题，男人是听不懂的。

She said it was just girl talk that a man wouldn't understand.

对不起，我听不懂你的话。

Sorry, I don't follow you.

他们讲着外人听不懂的笑话。

They were sharing a private joke.

她听不懂那个笑话。

She didn't get the joke.