内链、外链、反链、友情链接及相应作用

个人理解如有误，请斧正，如若更新将放到以下站点： http://alvincr.com/2020/05/%e5%86%85%e9%93%be%e3%80%81%e5%a4%96%e9%93%be%e3%80%81%e5%8f%8d%e9%93%be%e3%80%81%e5%8f%8b%e6%83%85%e9%93%be%e6%8e%a5%e5%8f%8a%e7%9b%b8%e5%ba%94%e4%

>>阅读原文<<