knee-deep
adjective uk/ˌniːˈdiːp/ us/ˌniːˈdiːp/
齐膝深的
If you are knee-deep in a substance, it reaches up to your knees.
We walked through the field, knee-deep in mud. 我们趟着没膝的泥水走过田野。
informal深陷其中的;忙着的
very involved in a difficult situation or large task
I'm knee-deep in paperwork. 我忙于应付文书工作。