From our list of class responsibilities we can deduce certain attributes for our analysis classes.
从类的职责列表中，我们可以确定分析类的一些属性。
Identify which of these analysis classes have some kind of relationship with each other.
确定哪些分析类具有与其它类之间的关系。
RUP's entity classes are roughly equivalent to the business-level analysis classes above.
RUP过程中的实体类大致上相当于前面提到的，业务级别的分析类。
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