1980年代之前，一座有著高功率发送机的无线电塔，就足以涵盖整著城市，但可取得的频谱有限，因此能服务的顾客不多。

Before 1980, a single tower with a high - powered transmitter might cover an entire city, but limited spectrum availability meant that it could not serve many customers.

youdao

1980年代之前，一座有著高功率发送机的无线电塔，就足以涵盖整著城市，但可取得的频谱有限，因此能服务的顾客不多。

Before 1980, a single tower with a high - powered transmitter might cover an entire city, but limited spectrum availability meant that it could not serve many customers.

youdao