當你 have your eye on the ball, 那麼就是說你把注意力都放了這件事情上，全神貫注。
I've got my driving test this afternoon. I really need to keep my eye on the ball if I'm going to pass.
I'm going on safari today. If I keep my eye on the ball, I might be lucky and see a lion!
Keep your eye on the ball with this project – we need to make sure we deliver it on time!
如果你 drop the ball, 那就是說你犯錯誤了，做錯事了。
I really dropped the ball in that interview – there's no chance I'll get the job.