kdka

Those first KDKA broadcasts led to the success of the radio industry.

那些最早的商业电台广播引领收音机产业的大获成功。

Only four years after the first KDKA broadcast, there were six hundred radio stations in the United States. Radio stations also began to broadcast in other countries.

仅在KDKA电台首次广播的四年后，美国就有600家无线电台开播，其他国家也开播了一些广播电台。

Senator Barack Obama also campaigned around the state and told Pittsburgh radio station KDKA that he expects a close race on Tuesday.

奥巴马参议员的竞选也围绕着这个州。他在匹兹堡KDKA电台上表示，他期待着星期二的一场势均力敌的争斗。