没辙

这个问题太复杂了，我真是没辙了。

zhège wèntí tài fùzá le, wǒ rēn shì méizhé le.

This problem is too complicated, I'm really at a loss.

他想辞职，但又怕影响升职机会，真是没辙了。

tā xiǎng qǐzū, dàn yòu pà yǐngháng shēngzhí jīhuì, shēnshì méizhé le.

He wants to resign but fears it will affect his promotion opportunities, he's really at a loss.