gb 2是什么意思

用法例句

Finally the PC based on desktop multipoint audiovisual conference system has been implemented, which supports the multipoint audio mixing, endpoint vedio selection and data service.

32 3协议 ,然后讨论了基于该协议的三层多媒体通信平台设计 ,最后在此平台上实现了多点视听会议系统 ,支持多点语音混合、终端选像和数据业务等功能 。