基本思想是分析用户行为日志获取用户偏好，根据用户偏好对网页进行过滤与重组。
The basic idea is analyze the search engine logs to get users' preferences, and according to these preference judgments to enable the search engine filters and reorganizes results.
网站服务器的日志包含了与用户行为相关的有价值的信息。
Your web server logs contain valuable information concerning user behavior on your site.
例如，如果您需要捕获大量用户行为，您最终可能会向您的应用程序添加大量日志记录语句。
For example, if you need to capture a lot of user behavior, then you could wind up adding a lot of logging statements to your application.
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