以海上目标监视与打击体系为例，给出利用UML中的用例图、类图、活动图、协作图对体系顶层需求进行描述的方法。
Taking sea target surveillance and hitting system for example, the top-level demands are described using user case diagram, class diagram, activity diagram and collaboration diagram in UML.
以海上目标监视与打击体系为例，给出利用UML中的用例图、类图、活动图、协作图对体系顶层需求进行描述的方法。
Taking sea target surveillance and hitting system for example, the top-level demands are described using user case diagram, class diagram, activity diagram and collaboration diagram in UML.
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