The wide center area contains content, arranged in logical groupings, that relate to the topic you currently have selected.
范围较宽的中间区域包含与您当前所选主题相关的内容，按逻辑分组排列。
The content (audio, music, image, and video files) is arranged by topic, location, type, author, by license and by source.
内容(音频、音乐、图片和视频文件)通过主题、位置、类型、作者、许可证和来源等进行排序。
Reciprocal links less valuable than one-way, because it tells Google that you’ve arranged it, rather than earned the link through creating great content
相互链接的价值不如单向链接，因为Google会检测出前者是经过认为安排的，而不是通过网站的高质量内容产生的指向该网站的链接
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