Definition
to be in a situation that is too difficult to manage or cope with.
深陷其中，无法脱身
He didn't realize he was in over his head when he took on the project.
他接手这个项目时没有意识到自己已经力不从心。
She tried to juggle two jobs at once, but she quickly found that she was in over her head.
她试图同时兼顾两份工作，但很快就发现自己力不从心。
Before you offer your help, make sure you can handle it, or you'll find yourself in over your head.
在提供帮助之前，请确保你能应付，否则你会发现自己力不从心。