Focus crawling is put forward for solving these problems, as it provides different services to meet the needs of individual users.
面向主题搜集技术就是针对这些问题而提出的，它为不同的用户提供不同的服务，以满足他们不同的需求。
Focus crawling is put forward for solving these problems, as it provides different services to meet the needs of individual users.
面向主题搜集技术就是针对这些问题而提出的，它为不同的用户提供不同的服务，以满足他们不同的需求。
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