广告业本质上是三合一产业，由广告商、媒体、以及制作和发布大多数全国性广告和零售广告的广告代理机构组成。
Advertising industry is essentially a triad consisting of advertisers, the media, and the advertising agencies that create and place most national and many retail ads.
广告业本质上是三合一产业，由广告商、媒体、以及制作和发布大多数全国性广告和零售广告的广告代理机构组成。
Advertising industry is essentially a triad consisting of advertisers, the media, and the advertising agencies that create and place most national and many retail ads.
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