To gain an understanding of the application flow, here is an activity diagram

为了让您了解应用程序流程，下面给出了一个活动图

Defines a partition by assigning responsibility to action states in your Activity diagram.

通过给动作状态分配职责,在活动图中定义分区.

Adds an internal action and at least one related outgoing transition to your Activity diagram.

将一个内部动作和至少一个相关传出转换添加到活动图中.

On the other hand, Arrange All arranges the entire activity diagram independently of the selected object.

从另一方面看， Arrange All 会分别安排这个被选中对象的整个活动图。

The filled circle represents the starting point of the activity diagram, effectively a placeholder, and the filled circle with a border represents the ending point.

实心圆表示活动图的起点，实际上是一个占位符，带边框的实心圆表示终点。

A business worker would not be shown in an activity diagram for a business use case itself, but it would be shown as part of the business use case realization.

业务人员将不会显示在一个为了业务用例本身所绘制的活动图里，但是他会作为业务用例实现的一部分被显示出来。

The formal semantics difined here is able to deal with most of the features of UML activity diagram, and establish the foundation of describing and analysis of work flow.

该形式语义覆盖了UML活动图的绝大部分特征，为精确描述工作流程并对其进行分析奠定了基础。

For example, if an operation can be modeled completely as an activity diagram there should be no reason why that operation implementation could not be generated.

举例来说，如果可以将一个操作完整地建模为活动图，那么就没有理由不能生成该操作的实现了。