World AD and world growth are not a zero sum game.

世界性的反萧条与世界性增长并不是一个零和博弈。

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Therefore the AD does not have to start from zero, since the page is no longer blank, which saves the client time and money.

因此广告不必从零开始，因为这一页不再空白，这给客户省去了钱和时间。

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In this paper we discuss a method for audio-based retrieval and location for AD, which USES short time average zero-passed rate and relativity-function to retrieve and locate AD from real-time audio.

本文讨论一种基于音频信号的广告条目检索和定位的一种自适应方法，它利用短时平均过零率和互相关函数从实时音频数据流中快速检测和定位广告条目。

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Interest rates can be lowered to zero and money can be printed ad nauseum, but if excessive debt within the system is restraining private demand, the decline in the velocity of money will offset the benefit of the additional supply of dollars.

FORBES: The Bailout Mentality -- The REAL "New Normal"

By August 17, it had reached zero and, following the release of the new ad, has climbed even further, to 7.9 on September 9.

FORBES: Kia Motors Boogies Its Way into View of New Car Buyers

In a 2-minute ad spot, the company pitches its formula to fight obesity: Choose products with low or even zero-calorie content, including a broad array of low-calorie drinks from its own portfolio ( Coming Together).

FORBES: One Thing Missing From Coca Cola's Formula For Fighting Obesity