在DataAccess子系统内部实际上已经有了很多东西：SQL语句生成，错误处理，结果集管理，等等。

There is really a lot going on inside the DataAccess subsystem: generation of SQL statements, error handling, result set management, etc.

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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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