keep an ear to the ground 保持高度警觉

　　对话中的应用：

　　A：Congratulations! You've been elected.

　　A：祝贺你当选！

　　B: Thank you. I'll be a good mayor.

　　B：谢谢，我会做一名好市长的。

　　A: What should you do for the city?

　　A：你要为这座城市做些什么呢？

　　B: I'll try to keep an ear to the ground first and then try my best to deal with everything well.

　　B：首先我会设法注意人们的想法，然后尽力把一切事物处理好。

　keep one's mouth shut 不要张扬

　　对话中的应用：

　　A: You look scared today. What's wrong with you?

　　A：今天你看上去很惊恐，怎么了？

　　B: The criminal told me to keep my mouth shut.

　　B：罪犯告诉我不许声张。

　　A: Criminal? What do you mean? Didn't you run into...

　　A：罪犯？你什么意思？难道你遇到了……

　　B: A robbery. The robber threatened to kill me if I told anyone about him.

　　B：一宗抢劫案，抢劫犯威胁说，如果我告诉任何人有关他的事，他就加害于我。

　　A: Don't be afraid. Let's call the police. They'll help us.

　　A：别害怕，咱们给警察打个电话，他们会帮助处理这件事的。