knock sb back sth to cost you a lot of money使某人花费〔大笔钱〕:•His new car knocked him back several thousand dollars.他那辆新车花了他好几千美元。ˌknock sb ˈback sth(BrE) (informal)to cost sb a lot of money用掉某人一大笔钱That house must have knocked them back a bit.那房子一定花了他们不少钱。 |