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1·He knows something about the boss, which is his ace in the hole.

他对老板有所了解，这是他的王牌。

2·Our superior technology is our ace in the hole.

我们的优越技术是我们手中的王牌。《柯林斯英汉双解大词典》

3·That 100 dollars is my ace in the hole.

那100美元是我应急备用的钱。

4·Arizona now becomes our ultimate 12 ace in the hole.

现在亚利桑那是我们最后一张秘密王牌。

5·My daughter is a little girl who can ace in anywhere.

我的女儿是一个人见人爱的小姑娘。

6·That spare can of gas in the trunk was our ace in the hole.

后背箱里那罐剩余的汽油是我们最后的储备。

7·A good negotiator always have more than one ace in the hole.

谈判高手总有数张王牌在手。

8·Your competitors do not know that you are an ace in the hole.

你的竞争者不知道你会有这样有用的办法。

9·You are my ace in the hole; I'll call on you when I need you.

你是我共患难的朋友，需要时我会来找你。

10·Now he has to play his ace in a bid to revive his flagging fortunes.

现在他叫牌不得不打出王牌来重振旗鼓。