Web page lifetime analysis from users perspective is important to enhance the performance of web crawlers and search engines,and to improve the efficiency of web advertising.
从用户的角度对网页的生命周期进行分析可以提高网络爬虫和搜索引擎的性能,改善网络广告的效果。
参考来源 - 基于用户兴趣分析的网页生命周期建模 in C·2,447,543篇论文数据，部分数据来源于NoteExpress
Sitemaps 0.90 is a simple and intuitive way for webmasters to provide the right level of information to Web crawlers so that they can efficiently crawl a Web site.
Sitemaps 0.90为 Web 站点管理员提供了简单而且直观的方法，使他们可以向 web 爬虫程序提供正确的信息，从而使爬虫程序能够高效地爬行某个 Web 站点。
Also known as "invisible web", the term "deep web" refers to a vast repository of underlying content, such as documents in online databases that general-purpose web crawlers cannot reach.
“深网”也被称做“隐形网”，指的是网络中存储数量浩繁的基本信息的空间，例如存储于在线数据库中的文件，一般用途的网络搜索器是找不到这些文件的。
Yet how these hairy crawlers negotiate steep, slippery surfaces has been a tangled web for arachnologists.
不过这些毛绒绒的蜘蛛如何在或陡峭或湿滑的表面上立足，一直令蜘蛛学家们颇为费解。
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