另外还需要定义状态间的转换。

You also need to define transitions between states.

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状态机混合了表示状态的节点以及节点间的转换。

A state machine has a mixture of nodes representing states and transitions between them.

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状态间的转换通常应该是同步的，因为所有者没有改变。

Transitions within states should normally be synchronous, since there is no change of owner.

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It was supposed to maintain the convertibility of the currency into gold.

它的作用在于保持,货币与金子间的转换。

耶鲁公开课 - 金融市场课程节选