As a stopping point on the famous Silk Road, Loulan is believed to have been gradually covered over by sandstorms from AD 200 to AD 400.

楼兰是著名的丝绸之路的一个中转站，据说在公元200年至公元400年期间，它逐渐被沙尘暴覆盖。

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Act as agent ad litem or defense counsel in private prosecution proceedings.

担任刑事自诉案件当事人的诉讼代理人或辩护人。

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Initial: At this level, the software process is characterized as AD hoc and chaotic.

初始化：在此级别，软件流程的特点是专用性较强，比较混乱。

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You know, you've seen, and there are some products where they sell themselves as no-ad products.

你知道，你也见过，有的产品销售的时候号称无广告产品。

广告和价格的关系 - SpeakingMax英语口语达人

With her family in financial straits, Ms. Diller found work as a society columnist for a local newspaper, then as an ad-copy writer and as a writer at radio station KROW in Oakland.

WSJ: Humorist Phyllis Diller Dies at 95

Riad al-As'ad, who held on to the top spot even after the January defection of Brigadier General Moustafa al-Shaikh, who now heads a military council meant to absorb higher-ranking defectors.

WSJ: Syrian Brass Defect, Buoying Rebels

The World Wide Web, too, is in its fourth year as an ad vehicle -- and its share of all ad money is still at only 0.7%.

FORBES: World Weary Web