a tough nut

漢語翻譯

例句：

1. I asked her for the money, but she was a tough nut to crack and I went away without it.
   我向她要錢，但她這個人很難對付，因此我空手而歸。
2. The final exam was a tough nut.
   畢業考試不好對付。
3. She's a tough nut to crack; I don't think she'll give us permission.
   她這個人不好說話，我想她不會答應我們的。