trade
    n. 貿(mào)易；商業(yè)；交易。如：
    The trade with neighbor countries is very important to China’s economy.
    與鄰國(guó)進(jìn)行貿(mào)易對(duì)中國(guó)的經(jīng)濟(jì)是非常重要的。（trade是一種行為。）
    v. 交換；貿(mào)易。如：
    We trade with people from many countries.
    我們和來(lái)自許多國(guó)家的人們進(jìn)行貿(mào)易往來(lái)。
    If you don’t like your toy, I’ll trade with you.
    如果你不喜歡你的玩具，我和你交換好了。（trade經(jīng)常伴隨著介詞with。）
    [身臨其境]
    1996年高考單項(xiàng)填空第13題：
     Many people agree that _______ knowledge of English is a must in _______ international trade today.
    A. a; 不填 B. the; an C. the; the D. 不填; the
    （答案是A。international trade 國(guó)際貿(mào)易）
    [拾零]
    trade常用表達(dá)：
    trade in 做……買賣
    trade A for B 用A交換B（A和B都是交換對(duì)象）