This program can encapsulate some system protocol, provide up-application with uniform interface, be easily used.
该通用通讯程序能够封装多种底层协议，为上层应用提供统一的调用接口，方便使用。
The ugly truth is that a uniform service interface is very difficult to build.
尴尬的事实是建立统一的服务接口是一件非常困难的事情。
The ugly truth is that a uniform service interface is very difficult to build.
尴尬的事实是建立统一的服务接口是一件非常困难的事情。
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