The sequence diagram of Figure 1 is simpler than that for the basic course of action because the logic of an alternate course is typically simpler.
图1的序列图要比基本行动过程的序列图简单，因为备选过程的逻辑通常更简单些。
State diagram, activity diagram, sequence diagram and cooperation diagram express the inter-action.
状态图、活动图、时序图和协作图描述系统内部行为。
State diagram, activity diagram, sequence diagram and cooperation diagram express the inter-action.
状态图、活动图、时序图和协作图描述系统内部行为。
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