Disk Usage Provision. 90% or more of your content on your website must be linked from an HTML or similarly coded web page where all content is freely available to the public.
磁盘使用的规定。90%以上的内容或在您的网站必须与从HTML或类似编码的网页，所有的内容是免费提供给公众。
The idea here is that if other people find your website helpful or entertaining enough to recommend that their visitors check it out, it must be worthwhile.
原理是，如果其他人因为你的站点很有用或者很娱乐而把它推荐给自己的用户，那么你的站点就是有价值的。
Therefore, it must be stressed that the majority of your SEO efforts should be spent seeking inbound links, not endlessly tweaking your own website.
因此必须强调的是，你得把大部分搜索引擎优化工作放在寻找入站链接上，而不是永无止尽地调整你的网站页面。
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