shake a leg 赶紧，赶快，赶紧走

　　Come on, shake a leg, you're going to be late for school.

　　拜托，赶紧的，你上学要迟到了。

　　Let's shake a leg. They are waiting for us!

　　我们赶快，他们在等着呢。

　　疯狂练习吧！