knuckle down

1. PHRASAL VERB （尤指前期不努力之后）开始努力工作（或学习）
   If someone knuckles down, they begin to work or study very hard, especially after a period when they have done very little work.
   1. The only thing to do was knuckle down and get on with some serious hard work...
      唯一能做的就是开始努力工作，好好干出点儿成绩来。
   2. He managed to knuckle down to his lessons long enough to pass his examination.
      他在离考试还有足够长时间的时候就开始认真学习，从而通过了考试。

1. The only thing to do was knuckle down and get on with some serious hard work
   唯一能做的就是开始努力工作，好好干出点儿成绩来。
2. He managed to knuckle down to his lessons long enough to pass his examination.
   他在离考试还有足够长时间的时候就开始认真学习，从而通过了考试。
3. If you want to pass that exam, you'll have to knuckle down ( to some hard work).
   你要想考试及格，就得开始下功夫（苦干）了。
4. 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。
5. We've got to knuckle down and clean the house.
   我们得好好干了，把屋子打扫干净。
6. Just on ur marks and get set, knuckle down ur life.
   各就各位，随时预备开始你的新生活，并记得认真去对待！
7. You should knuckle down to finding a job.
   你应该努力去找一份工作。

verb

1. work very hard, like a slave

   Synonym:    slavebreak one's backbuckle down