| 词组 | tough nut; tough nut to crack; hard nut; hard nut to crack |
| 释义 | tough nut; tough nut to crack; hard nut; hard nut to crack noun someone who is difficult to deal with, especially one with a tendency to violence US
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英语词组固定搭配大全包含4241条英汉双解词组，基本涵盖了全部常用英文词组、短语的翻译及用法，是英语学习的有利工具。