管理员可以看到进行的所有更改，可以控制是否执行这些更改，而且可以看到更改背后的原因。
The administrator can see all changes being made, can control whether they are made or not, and can see the reasons behind the changes.
在图22显示的示例中，是用控制流捕获流程中发生的几个初始和最终事件背后的逻辑的。
Figure 22 shows an example using control flow to capture the logic behind several initial and final events that occur in a process.
自然选择褪去了厚厚的毛发，但是却把背后的控制机制留了下来。
Natural selection removed the thick hair but left behind the mechanism for controlling it.
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