我们根据领域还是架构来定义子系统？
Would we define subsystems according to domain or architecture?
通过分解聚集和继承层次结构，您简化了模型，在定义子系统时使其更易分析。
By collapsing aggregation and inheritance hierarchies, you simplify your model, making it easier to analyze when you define subsystems.
子系统实现一个或多个接口，这些接口定义子系统可以执行的行为。
Subsystem achieve one or more interfaces, the definition of these interfaces can be implemented subsystem behavior.
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