退换的英文：
exchange a purchase

参考例句：
  • Sale goods in this shop are not exchangeable.
    本店货物售出概不退换。
  • I would like to refund this mobile phone.
    我想退换这个手机。
  • You're buying a used car? Caveat Emptor .
    你买了一辆二手车吗？货物出门，概不退换。
exchange是什么意思：
n. 交换，互换，交流；兑换，汇率；交易所
v. 交换，互换；交流；兑换
  • regional exchange
    美国在纽约以外地区的证券交易所
  • This exchange takes place in the foreign exchange market.
    汇兑是在外汇交易市场上进行的。
  • He gambles on the stock exchange.
    他从事股票投机。
  • Sometimes we exchange with words.
    有时我们相互交谈几句。
  • I'll exchange it for a token.
    我给你换个专用辅币。
purchase是什么意思：
v. 购买；赢得
n. 购买；紧握
  • purchase freedom with Blood
    以血的代价赢得自由
  • This orchard became ours by purchase.
    这个果树园被我们买下了。
  • such as stores requisition, purchase requisition,
    像库存调拨单，购物申请单，
  • He purchased this stamp at an auction.
    他在拍卖会中购得这枚邮票。
  • Their purchase is purely a paper transaction.
    他们的购买完全是纸上交易。

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