abbr.廣告 (=advertisement)

abbr.公元(=Anno Domini)

That's an interesting ad. 那是有趣的廣告。

I got four replies to my ad about the bicycle for sale. 已經(jīng)收到了四份對我出售自行車廣告的回信。

The ad was run in the paper for a week. 這則廣告在報上連續(xù)刊登了一個星期。

It was first built in 326 AD and restored several times through the centuries. 它始建于公元326年。幾個世紀(jì)以來，人們對它進(jìn)行了幾次重建。