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

The opponent has to play his trump card to secure his third trick.
对方只好打出将牌以赢得第三墩牌。
She could threaten to play her trump card, an autobiography of embarrassing disclosures.
她可能会威胁要拿出她的杀手锏：出自传来爆料糗事。
This is my trump card. I never use it easily.
这可是我的杀手锏，不轻易使用的！
When his father refused to let him have his own way, the child played his trump card by crying.
看到爸爸没有如自己的意，那孩子便使出绝招，哇的一声哭了起来。
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。
The candidate still has one more trump card to play.
候选人手里还有一张王牌。
Nor can we any longer fall back on our historical trump card of geographic isolation.
我们也不再能依靠天然屏障的历史王牌。
Curviness is the trump card.
但是曲线美才是王牌。
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。
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。