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1、Bkeep up with释义:1.跟上They walked so fast that I could not keep up with them. 他们走得那么快,我没法跟上。

2、2.和...保持联系She has kept up with some of her friends since her retirement. 她退休后一直同一些朋友保持着联系。

3、3.跟上……，不落后于come up with 释义:赶上We came up with a group of tourists. 我们赶上了一群旅游者。

4、2.(针对问题等)想出;提供He came up with good ideas for the product promotion. 他想出一个推广产品的好方法。

5、 He could not come up with a proper answer. 他想不出一个合适的回答。

6、3.准备好(钱等)You must come up with the money by tomorrow night. 你明晚之前必须准备好钱。

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