The sequence activity is hidden to keep the diagram clean.
可以隐藏序列活动，以保持图表清洁。
This activity is a container, much like a Sequence Activity or a Scope.
此活动是一个容器，非常类似于序列活动 (Sequence Activity)或范围 (Scope)。
Example behavior diagrams are activity, use case, and sequence diagrams.
行为图的实例是活动图，用例图和序列图。
Example behavior diagrams are activity, use case, and sequence diagrams.
行为图的实例是活动图，用例图和序列图。
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