out of your depth
US /aʊt əv jʊər dɛpθ/
UK /aʊt əv jʊər dɛpθ/
1.
力不从心, 超出能力范围
in a situation that is too difficult for you to understand or deal with
:
•
I felt completely out of my depth in the advanced physics class.
在高级物理课上，我感到完全力不从心。
•
He's a good manager, but he's out of his depth when it comes to international finance.
他是个好经理，但在国际金融方面他力不从心。