Advertisers were also more frequently using performance-based ads - where they pay only when someone clicks on the AD or buys something after seeing the AD.

广告主也更频繁地使用基于表现的广告，这样他们只有在用户看广告之后点了广告或购买物品时才要付费。

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The AD sufferers scratched more frequently and intensely than the healthy subjects.

而特应性皮炎患者比健康人士挠痒的频率更高、程度更严重。

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In the last three months, which is the wine AD the most frequently seen?

在最近三个月内，您最常看到哪些葡萄酒的广告呢？

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But the penthouse was something of a detour in the conversion of much of the hotel by El-Ad Properties into 181 condominiums, a conversion during which El-Ad frequently evoked Eloise, the girl who lived at the plaza in books and film, to market its development.

WSJ: Candy Gets Taste of the Plaza