难以应付的问题或情况;难以说服或影响的人;
Painting the ceiling was a tough nut to crack.
油漆天花板是件难事.
She's a tough nut to crack ; I don't think she'll give us permission.
她这个人不好说话, 我想她不会答应我们的.
He's a tough nut to crack.
他是个很难说服的人.
It'strikes me that he's right a tough nut to crack.
在我看来,他可是个难对付的家伙.
This old man is a tough nut to crack!
这个老头是个难以说服的人.
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