名詞 trade in:

1. an item of property that is given in part payment for a new one
   同義詞：trade-in

動詞 trade in:

1. turn in as payment or part payment for a purchase
   同義詞：trade

1. The jewellery firm is just a front for their illegal trade in diamonds.
   該珠寶公司不過是進行非法的鉆石交易的幌子。
2. The company was granted a charter trade in the occupied territory.
   這家公司被授予特權，可以在被占領地區(qū)進行貿易活動。
3. The gas company is offering fifty pounds off a new cooker if you trade in your old one.
   如果你用舊廚灶來折價的話，那家煤氣公司愿以減價50英鎊出售一套新廚灶。
4. The old trade in black ivory is on more.
   昔日非洲黑奴的買賣已不復存。