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標準釋義：提供中英釋義與例句，尚未加入深度教學內容
trade-in
GEPT 中高級
C2noun
a used item that is given to a seller to partly pay for a new item
After driving his old car for several years, John decided to trade it in and use the value towards the purchase of a new vehicle.
舊換新；以舊品折抵

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