trump card

英 [ˈtrʌmp kɑːd]

美 [ˈtrʌmp kɑːrd]

n. 王牌; 绝招; 杀手锏

牛津词典

noun

王牌；绝招；杀手锏
something that gives you an advantage over other people, especially when they do not know what it is and you are able to use it to surprise them

noun

a playing card in the suit that has been declared trumps
1. the ace of trumps is a sure winner
Synonym:trump

Now it's time that you played your trump card.
现在是你摊王牌的时候了。
Henry is the trump card of France.
亨利是法国队中的皇牌。
The US faces special pressures in an election year, but it holds the trump card.
美国在选举年面临特殊压力，但是它手里握着王牌。
Ultimately we hold the trump card that no new treaty to evolve a closer union of eurozone states can be agreed without our consent.
最后，英国还有一张王牌：没有英国的同意，欧元区国家结成更紧密联盟的新条约就无法通过。
'What's her trump card?
什么是她的王牌呀？
His trump card played, captain lmrie rested his case.
在打出了王牌之后，伊姆里船长便静候分晓。
Don't reveal your trump card before the crucial moment.
不到紧急关头不要亮出撒手锏。
The United States also needs to help people adjust to change, so that it can maintain its greatest trump card: openness to trade, investment, people, and ideas.
美国还需要帮助民众适应变化，以便确保它的最大优势：对贸易、投资、民众和观念的开放。
It is always good to enter negotiations with a trump card.
手握一张王牌去谈判总是件好事。
The candidate still has one more trump card to play.
候选人手里还有一张王牌。