电视电话关上了。

The visionphone shuts off.

电视电话能传送和接收图象和声音。

A videophone can transmit and receive pictures as well as sound.

电视电话和激光电话优于现有的电话，可以沿着光纤组成的电话线同时传播声音和图像。

Superior to the existing telephones, the videophone, or laser phone, can transmit voice and image simultaneously along its telephone line which is made of optic fiber.

国家电网公司电视电话会议系统是一个庞大复杂的特殊业务网络，主要用于召开大规模、高规格电视电话会议。

The teleconference system for State Grid Corporation of China is a large and complex network to provide special high level and large scale teleconference service.