Framework components happen to behave like a state machine: input message, output message and component state are part of the model.
框架组件的行为正好类似于状态机：输入消息、输出消息和组件状态是模型的组成部分。
It is a component in a module just like the others we have seen, such as a business process, business state machine or business rules.
它是模块中的一个组件，就像我们已看到过的其他组件一样，如业务流程、业务状态机或业务规则。
The business state machine provides the ability for a condition to call (invoke) another component to perform the condition check.
对于某个条件，业务状态机可以调用另一组件来执行条件检查。
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