基于 Spider 的搜索引擎（Spider-based Search Engines）： 这种搜索引擎利用 Spider 技术 搜集当前网络上面的网页信息， 自动创建索引。
基于1个网页-相关网页
Concept-based Search Engines 概念式搜寻引擎
list-based search engines 范畴层次查询引擎
Email-based search engines 邮箱搜索
words-based search engines 词语查询引擎
Answer-based search engines 解答搜索
Spider-based search engines 引擎
Content-based search engines 基于内容的搜索引擎
First, let's look at how crawler-based search engines work (both Google and Yahoo fall in this category).
首先，让我们看看基于爬虫(crawler - based)的搜索引擎是如何工作的(Google和Yahoo都是这种类型)。
The pirates just moved their illegal activity to looser jurisdictions, such as Sweden—while still benefiting from American-based search engines and payment systems.
盗版者只要把其非法活动移至司法宽松的国家，就可继续使用总部在美国的搜索引擎和支付系统。
To solve this problem, search engines now rank a site largely based on the number of other sites that link to it.
为了解决这一问题，搜索引擎现在很大程度上根据链接到同一网站的其他站点数来对这个网站进行排名。
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