knuckle down

漢語翻譯

英文解釋：

動詞 knuckle down:

1. work very hard, like a slave
   同義詞：slave, break one's back, buckle down

例句：

1. If you want to pass that exam, you'll have to knuckle down (to some hard work).
   你要想考試及格，就得開始下功夫(苦幹)了。