knuckle down

基本解释

He would not knuckle down under their pressure.
他不会在他们的压力下屈服的。
wfet2009.blog.163.com
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。
bbs.arsenal.com.cn
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。

How long does it take me to find the k'th element? Linear. Because I've got to walk my way down it. OK? So in this case, you have linear access. Oh fudge knuckle.
线性的！因为我得从头,向下走一步步走,所以这里是线性访问，哦，有问题了吧。
麻省理工公开课 - 计算机科学及编程导论课程节选

"I think I knuckle down and focus a lot better when conditions are tough, " Webb said.
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