域名解析

https://plantegg.github.io/2019/06/09/%E4%B8%80%E6%96%87%E6%90%9E%E6%87%82%E5%9F%9F%E5%90%8D%E8%A7%A3%E6%9E%90%E7%9B%B8%E5%85%B3%E9%97%AE%E9%A2%98/