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1·There are fears that he will not be able to keep it up when he gets to the particularly demanding third year.

有人担心到了极其艰难的第3年他会坚持不下去的。《柯林斯英汉双解大词典》

2·Keep it up and good luck.

坚持下去，祝你好运。

3·Your dream has come true! Keep it up, my son!

你的梦想实现了！坚持下去，我的孩子！

4·Tha' won't have to keep it up much longer.

这种情况不会持续太久。

5·If your definition of boredom is being quiet, mindful, and reflective, keep it up.

如果你对无聊的定义是安静、专注和反思，那就将这一观点保持下去。

6·The events recently have gone extremely well and the hotel is beginning to get a very good reputation, so we need to keep it up.

最近的活动进行得非常顺利，酒店也开始有了很好的声誉，所以我们需要继续保持下去。

7·But can she keep it up?

但是她能保持住优势吗？

8·And you won't keep it up for very long.

而且你不会坚持多久。

9·Can they keep it up?

这样的情况能够持续吗？

10·So please, to all the American people, keep it up.

所以，所有美国人民，请继续努力。