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。

Our superior technology is our ace in the hole.

我们的优越技术是我们手中的王牌。

That 100 dollars is my ace in the hole.

那100美元是我应急备用的钱。

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。

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。