| 释义 |
knuck.le down.nQk76v adv [I] infmlto start working or studying hard开始认真工作You're going to have to really knuckle down to catch up on all the work you've missed.你真的得开始努力工作，补上没干的活。I can't seem to knuckle down to my studies these days--there are too many distractions.这几天我看来没法认真学习----分心的事太多了。
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