即使这些服务是为构造特定的方案而设计的，我们仍然能够以不同的组合方式用这些业务服务来实现原先没有预料到的方案。
Even though they have been designed for the construction of a specific set of solutions, existing business services can be combined in other ways to implement solutions that had not been anticipated.
即使他们对业务没有帮助，他们也能宣称成功。
They are able to claim success even if they are not helping the business.
通常情况下，需求会在项目的生命周期内发生变化，即使没有别的原因，交付项目所需的时间也常常会超出业务修改所需的时间。
More often than not, requirements will evolve over the life of the project, if for no other reason than the time it takes to deliver a project often exceeds the time businesses need to make changes.
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