an的例句：

　　I think you have made an error in calculating the total.

　　我想你在計(jì)算總數(shù)時(shí)出了差錯(cuò)。

　　We put an ad in the local paper.

　　我們在當(dāng)?shù)貓?bào)紙上登了一則廣告。

　　The government's policy is an open door to disaster.

　　政府的政策為災(zāi)難敞開了大門。

　　This door should only be used in an emergency.

　　這道門只能在緊急情況下使用。

　　He's an expert at getting his own way.

　　他在如何達(dá)到自己的目的方面很在行。