用（旧物）贴换新物; 出售，经营

1. 以旧换新：如果不是急的话,建议在冬季购车的朋友可考虑将购车时间推迟一些,因为每年12月至次年3月是汽车销售的淡季,各车行以旧换新(Trade in)的车辆相对较少,而每年春,秋季节考虑购买新车的人增多,Trade in 和Off lease的车辆较多,

2. 回购：回报波动variation in return | 回购 trade-in | 互联网Internet

3. 旧换新：转让 transfer | 旧换新 trade-in | 稳健保守 conservatism, prudence

1. 以(旧物)折价贴换同类新物
If you trade in an old car or appliance, you give it to the person you are buying a new one from so that you pay less.

e.g. He had a Rolls-Royce, and he traded it in for two matching silver Range Rovers...
他有辆劳斯莱斯，他把它折价贴换了两辆外形相配的银色路虎车。
e.g. Richard refused to trade in his old Canon cameras.
理查德拒绝用他的旧佳能相机以旧换新。

verb

1. turn in as payment or part payment for a purchase

e.g. trade in an old car for a new one

Synonym: trade