其次，更细微的原因是模型，不是图，成为系统的结构、语义和行为的记录的表示。
A second, more subtle reason is that the model, not the diagrams, becomes the expression of record for the structure, semantics, and behavior of the system.
该U ML模型实质上定义了什么是定义了任何实现了业务过程的解决方案模型都必须满足的结构和行为需求的规范。
This UML model provides what is, in essence, a specification that defines both structural and behavioral requirements that must be satisfied by any solution model that implements the business process.
这些模型可以定义系统的结构和行为。
These models may define the structure and behavior of the system.
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