短语 up to speed 意思是了解事情发展的最新情况, 它也可以指一个人能够胜任某事。
- Is Fran up to speed with the project yet? If not, can you please tell her what's been going on since the last meeting?
- Brian wasn't very good at using the software to begin with, but now he's up to speed. He just needed to practise.
值得注意的是，不要同短语 speed up 搞混，speed up 的意思是提速，加快。
- Mike, speed up a bit please! We need to finish this today.
