The type of organization is identified by a three letter code called a 'top level domain name.

组织的类型是通过三个字母的代码(被称作顶级域名)来定义的。

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Normally a server is not reachable from the Web at large without a static IP address, but a dynamic DNS service allows me to set up a temporary resolvable machine name under another top-level domain.

通常，如果一个服务器没有静态IP地址，那么来自Web上的访问流量就不可能太大，动态dns让我们可以在另外一个顶级域名之上临时建立一个可解析的机器名。

youdao

Apparently a single missing full stop at the end of the code meant that the domain Name Systems (DNS) failed to recognise.se as the "top-level" (country-wide) domain.

很显然，程序末尾仅少了个句号使得域名系统(DNS)无法识别“。se”了，“。se”是瑞典的“顶级”(国家)域。

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