Their competition and collaboration were creating the broadcastingindustry in the United States, beginning with the introduction of commercial radio programming in the early 1920s.
从20世纪20年代早期引入商业广播节目开始,这些竞争与合作就在开创美国的广播产业。
2
After 2003, the overall performances of broadcastingindustry have improved a lot.
2003年以后,广播产业有了明显的、整体的改观。
3
Chapter Three focuses on the pattern of the regrouping of America's broadcastingindustry.