You really know your stuff!

　　你对自己的领域确实很精通。

　　know one's stuff直译过来就是：“了解自己的东西”，这个短语的正确意思是：“精通自己的业务”。因此，当美国人说"You really know your stuff."时，他/她要表达的意思就是"You are really proficient in your own field."、"You are very skillful at your work."、"You know your field very well."。

　　情景对白：

　　Boss: Ben, you've done a great job since you came to the company. You really know your stuff. Keep punching.

　　老板：本，进公司以来，你一直表现很好。你对自己的领域确实很精通，继续好好干吧。

　　Benjamin: Thank you very much. I will.

　　本杰明：非常感谢，我会继续努力的。

　　搭配句积累：

　　①The boss thumbed up and praised me for my great achievement this month.

　　老板竖起大拇指表扬我这个月的业绩好。

　　②You got a promotion from an assistant to the department manager in less than three years.

　　你在不到三年的时间里，从一名助理升到了部门经理。

　　③A large sum of money will be given to you as a reward for your research in this field these years.

　　公司会给你一大笔钱，奖励你这些年来在这个领域做出的研究成果。

　　④You're doing well as a newcomer.

　　作为一个新人，你表现很不错。

　　单词：

　　1. stuff n. 材料，东西

　　I don't know anything about this antique stuff.

　　我对于这种古玩物件一无所知。

　　'What do you want to know?'—'About life and stuff.'.

　　“你想知道些什么？”——“关于生命之类的东西。”

　　3.Not just a website, but a website with stuff.

　　不单只是一个网站，而是一个真正有料的网站。

　　2. proficient adj. 精通的

　　A great number of Egyptians are proficient in foreign languages.

　　很多埃及人都精通外语。

　　1.She is proficient in operating the computer.

　　她操作电脑很熟练。

　　18.He doesn't look like a proficient in golf.

　　他看起来不象是个打高尔夫球的专家。