Commercial radio broadcasters have used long waves for nearly 60 years . 将近60年以来，民用的无线电广播一直用的是长波。
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What most americans have known as soap opera for more than half a century began as one of the hundreds of new programming forms tried out by commercial radio broadcasters in the late 1920s and early 1930s , as both local stations and the newly - formed networks attempted to marry the needs of advertisers with the listening interests of consumers 半个多世纪以来大部分美国人所熟悉的肥皂剧最早出现于20世纪20年代末至30年代初，当时，由于地方电台和新建立的广播网络试图将广告商的需求与消费者对广播节目的要求紧密结合起来，商业广播公司尝试了数百种新的节目形式，而肥皂剧就是其中的一种。
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