no paid links
无付费链接
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Because so many sites today are set up solely to serve as link exchanges, where they have no specific theme to their site (other than seemingly random - and usually paid for - outbound links).
因为当下有许多网站建立的唯一目的就是为了做友情链接，这些网站连个明确的主题都没有(除了有看似随意，其实为了赚钱的导出链接)。
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