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。
As for Ronaldinho's fitness, if he doesn't move I am sure that he will knuckle down and train hard to get back to his previous levels.
鉴于罗纳尔迪尼奥的健康状况，如果他不转会，我确定他能够一扫阴霾并且努力训练找回自己的最佳状态。
You never know what can happen in football but I know I am going to knuckle down, train hard, work hard and perform when I get my chance.
你永远不知道足球会发生些什么，但是我知道我准备开始屈服，努力训练，努力工作，在我得到机会的时候上场表现。
There's a start, a finish, and the faster you run, the further you go: the secret to winning a marathon is to knuckle down and keep going.
有起点，也有终点，你跑得越快，也就跑得越远：马拉松比赛获胜的秘诀是沉下气来，一直往前跑。
I've used three pencils right down to knuckle-stubs, and a whole tablet of paper.
我用掉三枝铅笔，还有一整本簿子。
I've used three pencils right down to knuckle-stubs, and a whole tablet of paper.
我用掉三枝铅笔，还有一整本簿子。
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