今天，世界上大约有一半的长途电话，电报及电视通讯都是由卫星转播的。

Today about half the world's long-distance telephone, telegraph, and television traffic is relayed by satellite.

youdao

今天，世界上大约有一半的长途电话，电报及电视通讯都是由卫星转播的。

Today about half the world's long-distance telephone, telegraph, and television traffic is relayed by satellite.

youdao