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

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。
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。
Henry is the trump card of France.
亨利是法国队中的皇牌。
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！
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。
Jack showed his trump card at the last minute.
杰克在最后一刻打出了王牌。
'What's her trump card?
什么是她的王牌呀？
I'll play my trump card in the final round.
在最后一局我会出王牌。
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。