考虑到时间问题，需要创建一个子系统，该子系统能够处理这些长时运行任务，向用户显示处理进度，并编制需要采取的后续步骤。

Because of the time involved, a sub-system needed to be created that could handle these long running tasks, keep the user informed of progress, and choreograph the next steps that needed to be taken.

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因此，我们觉得写一个子系统，允许使用它的用户避免处理源类型信息。

So, we decided to write a subsystem that would allow its users to avoid dealing with the sources of the type information.

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在网际协议多媒体子系统(IMS)中，一种用户简档被配备有提供一个或多个错误代码定义和相关联的错误处理指令的扩展模式。

In an Internet Protocol Multimedia Subsystem (IMS), a user profile is provided with an extended schema that provides one or more error code definitions and associated error handling instructions.

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