如清单1所示，三个实例的名称分别为box、yahoo和teoma。
Each instance is named box, yahoo, and teoma, as seen in Listing 1.
TypeDescription 类只是个抽象基类，其中定义了处理三种类型的方法：原生类型、数组和类实例。
The TypeDescription class is just an abstract base class with methods defined for dealing with three kinds of types: primitives, arrays, and instances of classes.
客户机向流程管理器发送了一条带有适当的三元组的消息之后，就会有一个流程实例被创建并开始运行。
Once a client sends a message to a process manager with the appropriate triplet, a process instance is created and starts running.
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