To use the state machine, I can instantiate a Nonprofit object and call methods on it for each event, followed by a !, as in Listing 2
要使用状态机，可以实例化一个Nonprofit对象并在其上为每个事件调用方法，后跟一个 !
To use the state machine, I can instantiate a Nonprofit object and call methods on it for each event, followed by a !, as in Listing 2
要使用状态机，可以实例化一个Nonprofit对象并在其上为每个事件调用方法，后跟一个 !
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