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

Not many people know it but shutting up can be the trump card in a lot of situations.
不是每个人都知晓这一点，但沉默在很多场合下的确是最好的王牌。
His other trump card is his financial independence.
韩寒的另外一张王牌就是他的经济独立性。
When we meet again, he tells me that the truth is, if you're a migrant's child, there is little chance you will make it in entertainment or sport. Your only trump card is education.
我们再次见面时，他告诉我，事实是，如果你是移民孩子，你在娱乐界和体育界几乎没有机会，你唯一的王牌就是教育。
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。
I'll play my trump card in the final round.
在最后一局我会出王牌。
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。
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。