要让用户能够与应用程序进行交互，通常要在服务器上保存关于这个用户对应用程序已经做了什么的信息。
For a user to be able to interact with an application, often information about what the user has been doing to the application is kept on the server.
该特性收集和存储与服务器、数据库、用户等有关的活动的统计信息。
This feature collected and stored statistics on activities involving the server, databases, users, and so on.
如果匹配，则向用户返回包含运行时间与开发服务信息的服务描述。
If a match is found, the service description including runtime and development service information is returned to the user.
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