Storing data is very useful, but often, we want to get some information back.
存储数据非常有用，但我们往往想要获得一些反馈信息。
This post is about one class which is very often forgotten or even unknown to many but which exposes some very useful methods.
这个帖子是关于一类，这是经常被遗忘，甚至不知道的很多，但其中暴露出一些非常有用的方法。
The tool is clearly very useful as a way to learn more about people whose usernames you come across online. It's not perfect but it's often quite good.
这项工具非常有用，因为通过这项工具，你可以了解你网上碰到的网名背后此人的更多信息、它还不算完美，但是相当不错了。
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