3.She has a lot on the ball. 她是一个能干的人。
“很能干”在英语中有很多种说法，比如：be able to do... be capable of ...但是to have a lt on the ball 更符合英美人的口语习惯。
I'm sure he can do a good job in the business. He has a lot on the ball. 我认为她肯定能做好这份工作。她很能干。
