从此，人们对广告代理制的研究就从未停歇。
Since then, the people has never stopped to research on the advertising agency system.
上世纪九十年代中前期，我国的广告代理制正式推行。
Chinas Advertising Agencies System was put in practice in the early 90s.
时至今日，人们对广告代理制的研究已经走过了整整15个年头。
时至今日，人们对广告代理制的研究已经走过了整整15个年头。
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