上个月我们提到过，为jsp定义的四个隐式对象可以用来在一个特定的上下文或者作用域中加入有状态数据。
As mentioned last month, four of the implicit objects defined for JSP pages can be used to associate stateful data within a particular context, or scope.
NIEM模型也不为在交换中装配所有对象而定义特定的消息类型或结构。
The NIEM model also does not define specific message types or structures for assembling all of the objects in an exchange.
客户端服务层定义了具体的实现类，负责从指示板传递数据、生成请求对象和调用特定的模拟器服务。
The client service layer defines the implementation classes responsible for taking the data passed from the dashboard, creating the request objects, and invoking a specified simulator service.
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