存心不良

tā míng zhī dào nà liàng chē xū yào dà xiū kě tā cún xīn bù liáng de bǎ tā mài gěi le tā men

他明知道那辆车需要大修，可他存心不良地把它卖给了他们。

He had acted in bad faith when he sold them the car knowing it needed a lot of repairs.