跟这些计划文档一样，需求管理(RM)计划对项目有很大的好处。
Like these plan documents, a requirements management (RM) plan can provide tremendous benefit to a project.
这些需求是不是通过用例来描述的，但他们通常是对系统有很大影响的系统特性，包括系统可用性，可靠性，系统性能和可支持性。
These are properties of the system that aren't described as use cases but usually have a great impact on them, involving the system's usability, reliability, performance, and supportability.
这个泡泡肥料有了很大的用途—不过它得等待人们对煤油灯和内燃机的需求。
The bubbling muck had immense value - but it had to wait for the demands of the kerosene lamp and the internal combustion engine.
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