a tough proposition

• [口]难处理的事[人]； 一件棘手的事

a tough proposition的用法和样例：

例句

1. Collecting bad debts is often a difficult affair.
   收呆帐往往是件棘手的事。
2. I'm afraid it's a hard nut to crack.
   恐怕那个件棘手之事。

词汇搭配

• a tough proposition [口]难处理的事[人...