catch up on
phrasal verbcatch up on something
- to spend extra time doing something because you have not done it earlier
补做（未做的事）；赶做；补上 - I have a lot of work to catch up on.
我有许多工作要补做。
- I have a lot of work to catch up on.
- (also catch up )to find out about things that have happened
了解（已发生的事情） - We spent the evening catching up (on each other's news).
我们那一晚上都一直在彼此通报情况。
- We spent the evening catching up (on each other's news).