a tough nut to crack
中文释义
难以解决的问题或挑战
A difficult problem or challenge that’s hard to solve.
常用搭配
- a tough nut to crack难解的题
- a hard problem to solve棘手难题
- a difficult challenge艰巨挑战
例句
- That riddle is a tough nut to crack.那个谜语是个难题。
- This client is a tough nut to crack, but we'll win them over.这个客户很难搞定，但我们会赢得他们。