a pretty penny
非常昂贵或值得的大笔金钱
口语·表示某物非常昂贵
英文释义
to cost a large amount of money
例句
That designer handbag cost a pretty penny, but she saved up for months to buy it.
典故来源
源自18世纪英语，“pretty”表示相当大，“penny”指钱，合起来意为“一大笔钱”。