1. Ý Nghĩa
A hard nut to crack/a tough nut to crack: dùng để mô tả một người, tình huống hoặc vấn đề khó hiểu, khó giải quyết, đòi hỏi nhiều nỗ lực, kỹ năng và sự kiên trì.
2. Ví dụ/Examples
My brother is a hard nut to crack when it comes to sharing his snacks.
Sarah can be a hard nut to crack; it’s hard to tell what she’s really thinking sometimes.
The case was a hard nut to crack for the detectives since the clues were elusive and misleading.
That old computer issue turned out to be a tough nut to crack, but finally, we got it working.
Convincing my dog to take a bath is always a tough nut to crack. He’s terrified of water!
You know, trying to grow tomatoes was a tough nut to crack; I don’t have a green thumb like my dad!