国际互联网络的发展,使全球范围内的信息交流变得越来越快速方便。一方面世界上任何地区的计算机只要通过电话线联通当地的ISP(互联网络接入服务商),就可以无限制地查阅全球范围的几乎任何信息,使得信息交流量达到前所未有的程度。信息交流量达到了空前丰富,但另一方面,国际互联网络也带来了信息泛滥问题,越来越多的人抱怨铺天盖地的网上信息,使人难以从中获取尽可能多的有价值信息,尽管已经有许多功能强大的搜索引擎可供查询各种信息网点, The development of the Internet makes the exchange of information worldwide faster and more convenient. On the one hand, computers in any part of the world can access virtually any information on a global scale without any restriction by simply connecting their local ISPs (Internet service providers) over the telephone line, making information exchange unprecedented. However, on the other hand, the Internet has brought about the problem of information flooding. More and more people are complaining about the overwhelming amount of online information that makes it difficult to obtain as much valuable information as possible. There are already many powerful search engines available for searching various information outlets,