Therefore, the major mobile operators are actively building a third-generation mobile communications networks.

因此，各大移动运营商都在积极建设第三代移动通信网络。

youdao

The third generation mobile communications systems have the advantage of large capacity, low consumed power, fine voice quality and confidentiality.

第三代移动通信系统具有容量大，功耗低，通话质量高和保密性好等优点。

youdao

As voice communications is the primary media of communication for human being, it plays a very important role from public switched telephone network to the third generation mobile communications.

话音是人与人之间交流的主要方式，从最早出现公共交换电话网络到现在的第三代移动通信，语音通信是其最基本的功能。

youdao