类似于序列图，通信图也对用例的动态行为建模。
Similar to the sequence diagram, the communication diagram can also model the dynamic behavior of the use case.
使用UML为实时系统的动态行为建模的方法是本文的研究内容之一。
The method to build the dynamic behavior models for the real-time system using UML is one of the research aspects in this paper.
有限状态机用于对系统的动态行为建模，一般用状态图来可视化表示，是对反应式系统建模的一种强大工具。
Finite state machine is used for the dynamic behavior of system modeling, which is represented by visual state chart. And the finite state machine is a powerful tool of reaction system modeling.
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