这意味着我们必须对每个解决方案定义一组迭代或者里程碑。
This means that we must define a set of iterations or milestones for each solution.
图书馆组织方案中经常使用规范文件来明确定义一组术语。
Authority files are often used in library-organization schemes to unambiguously define a set of terms.
有一组标准的事件，比如objectevent和TransactionEvent，但是解决方案可以定义新的事件类型，这些事件类型可以具有自己的属性集。
There is a set of standard events, such as ObjectEvent and TransactionEvent, but solutions can define new event types with their own set of attributes.
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