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

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。
Don't reveal your trump card before the crucial moment.
不到紧急关头不要亮出撒手锏。
Spatial sound reproduction, the loudspeaker's trump card ever since, is noticeably more three dimensional and offers a much larger spatial image.
音场表现是这对喇叭的王牌，它可以营造出一个更加立体的三度空间音场，空间感也更为广阔。
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。
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。
Proximity to America, Mexico's trump card, has been made more valuable by the high oil price.
邻近美国是墨西哥的王牌，这使得高油价更有价值。
This is my trump card. I never use it easily.
这可是我的杀手锏，不轻易使用的！
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。
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。