| 词汇 | tough-hard-nut |
| 释义 | a tough/hard nutidiom someone who is very unpleasant and difficult to deal with: 讨厌的家伙；难对付的人 As a teenager, Jack was a real hard nut, always getting into fights.十几岁的杰克很难管教，总是跟人打架。 |
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