在开发模式期间，我们需要创建对模型元素的依赖关系，而这个模型元素并不存在。
During pattern development, we need to create a dependency to a model element that does not yet exist.
表示此区域的模型视图集合的主题是依赖关系管理。
The theme for the collection of model views that represents this area is dependency management.
模型工件之间关系密切、相互依赖，甚至本质相同的系统也有不同的表示。
Model artifacts may have affinity relationships, direct dependencies, or may even be different representations or viewpoints of what is essentially the same system.
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