The three levels model based on J2EE platform is introduced, of which more emphasis on design and realization of the navigating engine is given.

介绍了基于J2EE平台的三层模型设计，并注重研究了导航引擎的设计与实现。

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Although it had incorporated just three years earlier, in late 1998, its eponymous search engine was already widely viewed as the best tool available for navigating the net.

虽然它的股份创办只有区区的三年时间，从1998年年底开始，与其公司同名的搜索引擎被普遍认为是最好的上网工具。

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Although it had incorporated just three years earlier, in late 1998, its eponymous search engine was already widely viewed as the best tool available for navigating the net.

虽然它的股份创办只有区区的三年时间，从1998年年底开始，与其公司同名的搜索引擎被普遍认为是最好的上网工具。

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