1·They do not need to know when, how, or why the services are invoked or who invokes them.
他们并不需要知道何时、如何或为什么调用服务以及谁调用服务。
2·The knowledge of the format is not in the parser but in the model, which is either accessed directly by the parser at run time, or generated into code that the parser invokes.
有关格式的知识不在解析器中,而是在模型中,模型可由解析器在运行时直接访问,或者将其生成为解析器可调用的代码。
3·What information do your business services need from the user when he or she invokes your service?
当用户调用您的业务服务时,该业务服务需要他/她提供什么信息?
4·The client in this case never invokes a method directly.
在这种情况,客户机从来不直接调用方法。
5·It is either an internal business component, or it is a service agent which invokes some remote component.
这是一个内部实现的商业组件或者是一个调用远端组件的服务代理。