Up to speed
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。
1. 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?
2. Brian wasn't very good at using the software to begin with, but now he's up to speed. He just needed to practise.
请注意：不要同短语 speed up 搞混，speed up 的意思是提速，加快。
The speed limit for cars in the UK is usually 30 mph in built-up areas, 60mph in countryside areas and 70mph on dual carriageways and motorways.