美国电视无疑是一种影响力巨大的媒介 ,正是由于它的巨大影响 ,因此比其他公众媒介受到更多的束缚和制约。这种社会权力的束缚和制约主要来自两个方面 :国家政权和社会舆论 ,而法律———舆论———经济利益构成的一个铁三角 ,从不同的方向影响着美国电视行业的生存与发展 U.S. television is undoubtedly a media of great influence. It is because of its tremendous influence that it is more constrained and restricted than other public media. This restriction and restriction of social power come mainly from two aspects: the state power and public opinion, and the law --- media --- economic interests constitute an iron triangle, from different directions affect the survival and development of the U.S. television industry