The car company launched a buyback program to encourage owners to trade in their old vehicles for new energy models.

buyback 是由动词 buy（购买）和副词 back（回、返）组成的复合名词，字面意思是"买回"，在商业中指企业从消费者手中回购自己产品的计划。 buyback program 特指企业为促进产品更新换代而推出的"回购计划"，通常以旧产品折价换取新产品。