https://zhanxw.com/blog/2011/03/ubuntu-tree-%e6%98%be%e7%a4%ba%e4%b8%ad%e6%96%87%e7%9a%84%e6%96%b9%e6%b3%95/ Combine knowledge and practice (知行合一) Fri, 25 Mar 2011 21:25:45 +0000 hourly 1 https://wordpress.org/?v=6.6.2