A service has the appearance of a software component, in that it looks like a self-contained function from the service requester's perspective.
一个服务表现为一个软件组件，因为从服务请求者的角度来看，它看起来就像是一个自包含的函数。
Some of the services are completely self-contained to support only internal MDI function, and are transparent to anything outside of the box.
有些服务是完全自包含的，仅支持内部MDI功能，对盒子外部的任何对象都是透明的。
For the later, however, it requires characteristics of self-contained function of application and having friendly customer interface and easily using operation, and so on.
而对于后者则要求应用程序功能完备，有友好的用户界面，易使用操作等特点。
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