ace up your sleeve
中文釋義
隱藏的優勢或策略，通常在關鍵時刻使用
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打出隱藏王牌
例句
- The coach had an ace up his sleeve for the final.教練為決賽留了一手王牌。
- We kept a discount as an ace up our sleeve in the deal.我們把折扣當作談判中的隱藏王牌。