cost an arm and a leg
花费巨大的代价；非常昂贵
口语·表示价格极其昂贵
英文释义
to be very expensive; to cost a lot of money
例句
That new sports car costs an arm and a leg, so I'll stick with my old one.
典故来源
源自二战时期，士兵失去肢体作为代价的夸张说法，后比喻价格极高。