keep it up

例句：

1. 1. She kept it up all night, and now she's exhausted.
   她整晚都在努力，现在筋疲力尽。
2. 2. He kept it up with his jokes, but he was really just trying to cheer me up.
   他通过笑话努力逗我开心，但他其实只是想让我振作起来。
3. 3. Keep it up! I'm always looking for new challenges to add to my portfolio.
   加油！我一直在寻找新的挑战来丰富我的项目组合。