And this was before the Ad came up for the army.

这些是军队的广告。

哈佛公开课 - 幸福课课程节选

We in religious studies tend to like these terms, AD rather than BC, Before Christ, and AD, because AD actually stands for Anno Domini, in the year of our Lord.

在宗教研究中我们喜欢用这两个术语，而不用BC，即“基督前“和，因为AD其实是Anno，Domini的缩写，即“主的年份“

耶鲁公开课 - 新约课程节选