在描述概念之后，我们介绍程序集的一些常被忽略的更强大的功能，通过示例说明这些功能。
After describing the concepts, we describe some of the more powerful features of the assembly that are often overlooked and illustrate the use of these features with examples.
应详细说明，但不要描述用户如何使用计算机程序。
Go into detail, but don't describe how the user might use a computer program.
可以采用此技术来描述服务使用者与服务提供程序如何进行交互，说明服务做什么而不用描述其如何实现。
The technique can be employed to describe how the service consumer interacts with the service provider, explaining what the service does without describing how it is implemented.
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