例：

　　He was being a doubting Thomas --someone who does not believe anything he is told.

　　他疑心很重，这种人不相信所听到的话。

　　2. Jack of all trades：万事通

　　例：

　　This man was a true Jack of all trades-- he knew how to do everything.

　　这是个真正的万事通，什么事情他都知道怎么做。

　　3. Johnny One Note：五音不全的人

　　例：

　　He was a Johnny One Note -- he could only sing one note.

　　他是个五音不全的人，连一个音符都唱不出来。

　　4. Uncle Sam：美国政府

　　例：

　　I am here to withdraw some money so I can pay my taxes to Uncle Sam.

　　我想取些钱向美国政府交税。

　　5. John Hancock: 签名

　　例：

　　He told Average Joe to sign his John Hancock at the bottom.

　　这位银行职员打印一些文件，让这人在底部签名。

　　6. an average Joe: An Average Joe is a common person -- either male or female.

　　普通人，可以是男也可以是女。

　　7. did not know Jack: This means "did not know anything about".“不知道”。

　　8. For Pete’s sake: This is an expression used to show a feeling like surprise or disappointment.

　　表示吃惊或失望，“拜托”