exchange 和replace的区别?因某些原因客户要求退换,请问使用exchange表达还是用replace或者return表达?

RETURN 有退货的意思，REPLACE 和EXCHANGE 都可以表示调换，EXCHANGE 用的更多点
exchange [iks'tʃeindʒ]
vt.
1. 换，更换，调换，掉换：例句: Most stores will allow the purchaser to exchange goods.
大多数商店将允许顾客更换商品。The two armies exchanged *ers.
两军交换了战俘。2. 换回，换来，换取：例句: I exchanged the defective tire for a good one.
我用一条有毛病的轮胎换一条新的轮胎。3. 把…换成；用…交换；兑换(for)：例句: I'd like to exchange this dress for one in a smaller size.
我想把这件衣服换一件小点尺寸的。to exchange honour for wealth
以荣誉换取财富4. 交换，互换，轮换 (with)：例句: to exchange gifts
互赠礼物
replace [ri'pleis]
vt.
1. 把…放回原处，放回：例句: Please replace the books after reading.
看完书后请将书放回原处。2. 代替，取代：例句: workers replaced by automated equipment
被自动化设备顶替掉的工人Trams are being replaced by the buses.
电车正在被公共汽车所代替。3. 替换；更换：例句: to replace a worn tire
更换旧轮胎The salesgirl said she would replace the TV set if we were not satisfied.
女售货员说如果我们对这台电视机不满意，她可以给换一台。4. 归还；赔：例句: Don't damage these ancient books;I shall not be able to replace them.
别把这些古书弄坏了，我可赔不起

exchange是交换，物-物之间
replace是代替
return是退回

用replace,调换
而return 指退回
exchange 指平等交换

用exchange。