As the Access class serves as the part of your system that interacts with the other pieces, you'll model that as an actor within your diagram.
因为访问类为你的系统提供与其它块交互的服务，所以在你的图表中，你要建模它为一个主角。
Fundamentally, working with actors is not that difficult, the easiest being to simply create an actor using the actor method of the actor class, as shown in Listing 1.
使用actor根本不困难，只需使用actor类的actor方法创建一个actor，见清单1。
This class is close to the model you are trying to produce, with the exception of one important limitation: as defined, a step is not attributed to an actor.
这个类接近于您试图产生的模型，只有一个重要的局限性除外：正如所定义的，step不归因于操作者。
This class is close to the model you are trying to produce, with the exception of one important limitation: as defined, a step is not attributed to an actor.
这个类接近于您试图产生的模型，只有一个重要的局限性除外：正如所定义的，step不归因于操作者。
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