The part on the very left is the name of the specific computer, the part on the very right is the top-level domain to which the computer belongs, and the part in between are the subdomain.
最左边的是特定的计算机的名称，最后边的是计算机所属的的顶级域名，中间部分是子域名。
Your URL: Top-level domain name, or Subdomain.
您的网址：顶级域名，或子。
The domain name before adding any subdomain, all can access to WEB address.
在域名前添加任何子域名，均可访问到所指向的 WEB 地址。
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