前段时间看了 hedong对于PageRank算法学习的文章http://hedong.3322.org/archives/000199.html，参考了 PageRank的英文原始资料，感觉hedong写的内容稍微少了点，能有原版译文就更好了！Google了一下，没任何资料……还是自己开金山词霸看吧-.-

　　想想反正都看了，索性再花点时间写成文字记下来，方便今后的同道者。可是……555，偶e文实在太Poor了，因此将原文一段段附上，如有严重错误，请一定留言指正！

　　这是第一段，译自：Google PageRank Introduction - http://pr.efactory.de/


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　　Within the past few years, Google has become the far most utilized search engine worldwide. A decisive factor therefore was, besides high performance and ease of use, the superior quality of search results compared to other search engines. This quality of search results is substantially based on PageRank, a sophisticated method to rank web documents.

　　在过去几年之内，Google成为了全世界被使用的最多的搜索引擎。与其它搜索引擎比较，除高性能和易用以外，一个决定性的因素是它的优秀的搜索结果。搜索结果的这质量极大地来源于PageRank——一个精密的排序网页文件等级的方式。

　　The aim of these pages is to provide a broad survey of all aspects of PageRank. The contents of these pages primarily rest upon papers by Google founders Lawrence Page and Sergey Brin from their time as graduate students at Stanford University.

　　本文的主要目的就是对PageRank的各个方面做一次广泛的勘测。本文内容主要依据Google创始人Lawrence Page和Sergey Brin在他们作为斯坦福大学研究生时的文章。

　　It is often argued that, especially considering the dynamic of the internet, too much time has passed since the scientific work on PageRank, as that it still could be the basis for the ranking methods of the Google search engine. There is no doubt that within the past years most likely many changes, adjustments and modifications regarding the ranking methods of Google have taken place, but PageRank was absolutely crucial for Google's success, so that at least the fundamental concept behind PageRank should still be constitutive.

　　经常被讨论的是，尤其是考虑到互联网的动态性，自从PageRank科学工作开始，许多时间被浪费了，因为他仍然可以是Google搜索引擎的等级等级的基本依据。毋庸置疑，在过去几年内有许多关于Google等级方法的调整和修改，但PageRank是Google成功的绝对关键，因此至少PageRank的根本概念在之后应该仍然不会改变的。

　　Since the early stages of the world wide web, search engines have developed different methods to rank web pages. Until today, the occurence of a search phrase within a document is one major factor within ranking techniques of virtually any search engine. The occurence of a search phrase can thereby be weighted by the length of a document (ranking by keyword density) or by its accentuation within a document by HTML tags.

PageRank的概念

　　从万维网的早期，搜索引擎开发不同的方法排序网页。实际上，直到今天，任一个搜索引擎对网页的排序，是根据搜索的词组短语在页面中的出现次数，并用页面长度和html标签的重要性提示等进行权重修订。


　　For the purpose of better search results and especially to make search engines resistant against automatically generated web pages based upon the analysis of content specific ranking criteria (doorway pages), the concept of link popularity was developed. Following this concept, the number of inbound links for a document measures its general importance. Hence, a web page is generally more important, if many other web pages link to it. The concept of link popularity often avoids good rankings for pages which are only created to deceive search engines and which don't have any significance within the web, but numerous webmasters elude it by creating masses of inbound links for doorway pages from just as insignificant other web pages.