In the development of a specialized search engine, design and implementation of Web Spider for Web pages acquirement have considerable influence on the overall performance of the search engine.

在专题搜索引擎的开发中，用于爬取相关网页的网络蜘蛛的设计与实现对搜索引擎的整体性能有较大影响。

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Think of it as a highly specialized search engine.

CNN: ASIANOW - TIME Asia | Asia Buzz: Spot The Fake

That long tail includes about a hundred databases of specialized information that the search engine is now working on indexing, such as the Security and Exchange Commission's online filings and the online collection of medical journals known as PubMed.

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Meltwater had argued that it provides a specialized news-related Internet search engine that allows its 4, 000 U.S. customers to search for and receive information about news items relevant to their businesses.

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