abbr.广告 (=advertisement)
abbr.公元(=Anno Domini)
That's an interesting ad. 那是有趣的广告。
I got four replies to my ad about the bicycle for sale. 已经收到了四份对我出售自行车广告的回信。
The ad was run in the paper for a week. 这则广告在报上连续刊登了一个星期。
It was first built in 326 AD and restored several times through the centuries. 它始建于公元326年。几个世纪以来，人们对它进行了几次重建。
