自20世纪90年代以来,因特网已成为世界上最大的信息资源宝库,网络信息的查找和检索,已远远超出了信息检索领域,得到了全球社会各界广泛、热烈和高度的关注。1985年,美国国家科学基金会(NSF)斥巨资建成了NSFNET,取代了ARPANET成为因特网的主干网,推动了因特网向社会公众的开放。 Since the 1990s, the Internet has become the world’s largest treasure trove of information resources. The search and retrieval of network information has gone far beyond the field of information retrieval and has drawn widespread, enthusiastic and high-profile attention from all walks of life in the world. In 1985, the National Science Foundation (NSF) made a huge sum of money to build NSFNET, replacing ARPANET as the backbone of the Internet and promoting the Internet’s opening to the public.