采用了简单的数据选择器，使得手动控制与自动控制的切换更为方便。
Using a simple data selector makes the switchover between manual control and automatic control more convenient.
选择结构化活动(也称为切换)根据条件控制流程采用的路径。
A choice structured activity (also known as a switch) controls which path the process takes, based on a condition.
表 1 列示了几种可用于在模式间灵活切换的重要控制键。
Table 1 lists several important control sequences that you can use to easily switch between modes.
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