本文主要介绍包括无线和有线台在内的美国广播电视网是如何招徕受众、吸引全国广告主,并最终将其转化成广告收益的。此外,还将察看主要的有线频道美国财经频道CNBC(ConsumerNewsandBusi-nessChannel)的运行状况,以此了解全国性广告销售及行销的基本策略。争取受众在过去的20年里,美国人均花费在收看电视节目的时间上一直较为稳定—— This article focuses on how the U.S. broadcast network, including wireless and cable TV stations, is attracting audiences, attracting advertisers across the country and ultimately turning them into advertising revenue. In addition, you will look at the health of CNBC (ConsumerNewsandBusi-nessChannel), a major cable channel, to learn about the nationwide strategy for advertising sales and marketing. Fighting for audiences For the past two decades, Americans have spent more time watching television programs than ever before -