Delete the old AD before you place the new one.

删除旧的广告，然后再放置新的。

youdao

Often, consumers need to get used to seeing your AD before they'll act on it.

通常情况下，消费者需要习惯于看到广告然后才会采取行动。

youdao

An attempt at viewing new ABC show Rookie Blue was only slightly more successful, as he was able to load a Toyota AD before the player froze up, but he wasn't able to actually load up the episode.

浏览abc公司的新剧《雏鹰展翅》时也仅仅是稍微好一点，因为在播放器死掉之前，成功的加载了一段丰田汽车的广告，但是仍然不能完全加载整个片段。

youdao

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

Somewhere some ad-man said that it takes at least 20 times of viewing an ad before someone remembers it.

FORBES: OMG...She Doesn't Even Tweet?

Even then, marketers will have to see solid results in either the brand-oriented metrics such as intent to buy or in sales driven directly from the ad before they move big budgets toward Twitter.

FORBES: Connect

Some firms started cutting back on ad budgets before the market dropped.

FORBES: Spin Control