1. All thumbs

满手都是大拇指（笨手笨脚）

He is all thumbs. = He is uncoordinated.

他笨手笨脚的。

例子：I am all thumbs at shuffing cards. Whenever I try, half of the deck falls on the floor.

我洗牌时笨手笨脚的。每一次我洗牌，总有半幅牌掉在地上。

2. An ace up my sleeve

袖里的王牌

I have an ace up my sleeve. = I have a plan that is unknown to others that will trick them.

我还有个不为人知的计划能治服他们。

例子：He thinks that he can beat me at tennis, but I have an ace up my sleeve. When he watched me play, I used my right hand and I am actually left handed.

他以为他打网球能赢我，岂不知我还有袖里乾坤。他看我练球时，我只用右手，其实我是个左撇子。

3. An open and shut case

明显的事件。

It was an open and shut case. = It was easy to figure out or to understand.

这件事很容易了解。

例子：There were many things that made us end our relationship; it was not an open and shut case.

我们分手的原因很多，这不是容易说得清的事情。