Activity form using input and output criteria, but no gateways, is more suitable for simplifying visualization of the process model by hiding the branching logic in the input and output criteria.
活动形式使用输入和输出条件，但不使用网关。它将分支逻辑隐藏在输入和输出条件中，因而更适于简化流程模型的可视化形式。
The definitions of the input and output criteria are part of the activity definition; they cannot be changed in any process model that reuses this task.
输入和输出条件的定义是活动定义的一部分，它们不能在任何重用这一任务的流程模型中被更改。
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。
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