1.纠缠
2.坚持地做
1.to persevere with something, especially something difficult or strenuous
2.to persist in asking somebody to do something
1.persist in;continue to do;worry continuously with suggestions,requests,complains,etc:
1.This is a process you are going to have to discover on your own, if you keep at it you will develop a knack for it.
这是你将必须自己去开发的过程，如果你坚持下去你定会发现其中的秘诀。
2.Because this book is so important, remember to keep at least one backup of it.
因为这本手册如此重要，所以请记得至少要保存一个备份。
3.But if you keep at it, 'you'll get a feel for what companies seem to be doing OK. '
不过如果坚持看报纸的话，“你就能够了解到哪些公司看来仍然运转良好。”
4.But now it has become difficult, in part because of my age, so people no longer tell me to keep at it, " she said. "
但现在情况变得更困难了，部分原因是我年龄的增加，所以人们也不再要求我继续怀孩子。
5.Three bidders are in on the auction for the company and one of them could keep at least some of the stores open.
三是在对投标人的拍卖公司之一，他们可以保持至少一些商店的营业时间。
6.We know it's easy to say, but you'll soon start to see and feel the benefits of dieting, providing you keep at it.
虽然我们知道说起来容易，但是只要你坚持，你不久就会看到并体会到节食的益处。
7.You may run into a different sort of trouble the next time around, but keep at it long enough and you'll run out of mistakes.
也许你会遇到其它麻烦，但只要你坚持下去，你就不会再犯错。
8.They have been a boon to my writing career and are what will make it possible for me to keep at it down the road.
我认为这是我的幸运，也是我在今后的岁月里还可以继续从事写作这个职业的理由。
9.The biggest is trying to keep at it on a normal pace.
最大的问题是如何保持一个正常的步伐。
10.There is no shortage of professional musicians who keep at it even though they have no hope of making a living that way.
就如同从来不缺乏坚持这种原则的专业级音乐家，即使这样做几乎不可能维持他们的生计。