求助：论文摘要翻译，十万火急！！！！谢谢！！！！！！！！

Search engine is a specific means of using the Internet for information gathering tool. In modern society, the importance of information already enjoys popular support. So how fast the collection, to obtain the necessary information a top priority. Divergent through the Internet, transmission of information collection is a common practice of modern society, so the network can quickly collect, sort summarized, storage, information for the search engine to generate and rapid development, and improve. This article from the search engine works and classification start, and then combining currently in use in various search engines in a few representative examples of search engines, through analysis and comparison of these examples of a database search engine size and scope, structure, Search function, the result will be displayed, the advantages and disadvantages of the similarities and differences in such areas, to systems that use various types of search engine of the role and characte