Idioms: catch sb. up on (sb. or sth.)

Meaning: to tell someone the news of someone or something.

固定搭配，意为“事后得到关于…的消息”，常用在两个人长时间没有见面了，坐下来好好聊聊天，叙叙旧。

Example:
1. He caught me up on what's happening at the front.
他把有关前线的最新消息告诉了我。

2. I have to take some time to catch myself up on the news.
我得花时间来了解最近的新闻。