在高等微积分讲座中,我感到完全力不从心。
During the advanced calculus lecture, I felt completely ___out ___of ___my ___depth.
在法律部门开始新工作时,面对复杂的案件文件,我立刻感到力不从心。
Starting my new job in the legal department, I was immediately ___out ___of ___my ___depth with the complex case files.
当被要求在没有管理经验的情况下领导这个项目时,他发现自己力不从心。
When asked to lead the project without any prior management experience, he found himself ___out ___of ___his ___depth.