trade in

名词 trade in:

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

动词 trade in:

1. turn in as payment or part payment for a purchase
   同义词：trade

1. The jewellery firm is just a front for their illegal trade in diamonds.
   该珠宝公司不过是进行非法的钻石交易的幌子。
2. The company was granted a charter trade in the occupied territory.
   这家公司被授予特权，可以在被占领地区进行贸易活动。
3. The gas company is offering fifty pounds off a new cooker if you trade in your old one.
   如果你用旧厨灶来折价的话，那家煤气公司愿以减价50英镑出售一套新厨灶。
4. The old trade in black ivory is on more.
   昔日非洲黑奴的买卖已不复存。