核心句型：
    You really know your stuff!
    你對(duì)自己的領(lǐng)域確實(shí)很精通。
    know one's stuff直譯過來就是：“了解自己的東西”，這個(gè)短語的正確意思是：“精通自己的業(yè)務(wù)”。因此，當(dāng)美國人說"You really know your stuff."時(shí)，他/她要表達(dá)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."。
    情景對(duì)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，進(jìn)公司以來，你一直表現(xiàn)很好。你對(duì)自己的領(lǐng)域確實(shí)很精通，繼續(xù)好好干吧。
    Benjamin: Thank you very much. I will.
    本杰明：非常感謝，我會(huì)繼續(xù)努力的。
    搭配句積累：
    ①The boss thumbed up and praised me for my great achievement this month.
    老板豎起大拇指表揚(yáng)我這個(gè)月的業(yè)績好。
    ②You got a promotion from an assistant to the department manager in less than three years.
    你在不到三年的時(shí)間里，從一名助理升到了部門經(jīng)理。
    ③A large sum of money will be given to you as a reward for your research in this field these years.
    公司會(huì)給你一大筆錢，獎(jiǎng)勵(lì)你這些年來在這個(gè)領(lǐng)域做出的研究成果。
    ④You're doing well as a newcomer.
    作為一個(gè)新人，你表現(xiàn)很不錯(cuò)。
    單詞：
    1. stuff n. 材料，東西
    I don't know anything about this antique stuff.
    我對(duì)于這種古玩物件一無所知。
    'What do you want to know?'—'About life and stuff.'.
    “你想知道些什么？”——“關(guān)于生命之類的東西?！?BR>    3.Not just a website, but a website with stuff.
    不單只是一個(gè)網(wǎng)站，而是一個(gè)真正有料的網(wǎng)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語。
    1.She is proficient in operating the computer.
    她操作電腦很熟練。
    18.He doesn't look like a proficient in golf.
    他看起來不象是個(gè)打高爾夫球的專家