ace up your sleeve
中文释义
隐藏的优势或策略，通常在关键时刻使用
常用搭配
- keep an ace up your sleeve留一手王牌
- have an ace up your sleeve藏有王牌
- play the ace up your sleeve打出隐藏王牌
例句
- The coach had an ace up his sleeve for the final.教练为决赛留了一手王牌。
- We kept a discount as an ace up our sleeve in the deal.我们把折扣当作谈判中的隐藏王牌。