have a card up your sleeve
暗中保留一張殺手锏,以便在關(guān)鍵時(shí)刻使用
口語·表示有備用策略
英文釋義
to have a secret plan or advantage that can be used if needed
例句
Don't worry, I have a card up my sleeve if the negotiation goes wrong.
典故來源
源自魔術(shù)或賭博中藏牌作弊的手法,比喻暗中保留優(yōu)勢(shì)或計(jì)劃。