| 词汇 | knuckle down |
| 释义 | knuckle down phrasal verb with knuckle verb uk/ˈnʌk.əl/ us/ˈnʌk.əl/ informal 开始努力工作;开始用功学习 to start working or studying hard You're going to have to really knuckle down (to your work) if you want to pass your final exams. 如果你想通过期末考试，就必须用功学习。 |
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