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

Curviness is the trump card.
但是曲线美才是王牌。
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。
We always adhere to customer-centered, high-quality products for the "trump card";
公司始终坚持以客户为中心，以高品质的产品为“王牌”；
In the end, the Ten took their appeal to the Supreme Court; this, they had believed from the outset, would be their trump card
最后，10个人上诉到最高法院：他们从一开始就认为这一招是他们的王牌。
Now it's time that you played your trump card.
现在是你摊王牌的时候了。
An unstoppable trump card with enough power to bring order to the world.
一张所向披靡的王牌将命令这个世界。
Jack showed his trump card at the last minute.
杰克在最后一刻打出了王牌。
The candidate still has one more trump card to play.
候选人手里还有一张王牌。
Henry is the trump card of France.
亨利是法国队中的皇牌。
This is my trump card. I never use it easily.
这可是我的杀手锏，不轻易使用的！