除去付昂贵的房租, 这个月还净余150元。
After paying a high rent for the house, we still have 150 yuan left.
案例还包含一组元数据，即关于案例本身的信息。
The case also contains a set of metadata or information about the case.
在此级别，工作产品、任务和角色是元数据元素，元数据还定义这些类型(角色执行的任务)之间的关系。
At this level, work product, task, and role are metadata elements, and the metadata also defines what the relationship is between these types (tasks that are performed by roles).
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