清华大学信息科学技术学院李衍达院士领导的网络信息研究小组，经过两年多艰苦努力开发出的“宽带多媒体数据广播系统”，近日推向市场，并在北京、济南、青岛等城市的多家有线电视台试播成功。目前，我国绝大部分因特网用户需通过电话线拨号上网，速度慢而且费用高，网上中文 After more than two years of painstaking efforts to develop the “broadband multimedia data broadcasting system,” recently, the network information research group led by Academician Li Yanda, Tsinghua University School of Information Science and Technology, recently introduced to the market and in Beijing, Jinan, Qingdao and other cities a number of cable TV pilot success. At present, the vast majority of Internet users in our country need dial-up access through the telephone line, which is slow and expensive. Online Chinese