所有的通信系统，包括语言，都有一些共同的特征。
So all communication systems, language included, have certain features in common.
达成了通用的数据格式之后，下一步涉及到多个使用不同的编程语言的全异系统彼此间能进行通信。
After the common data format had been agreed to, the next step involved getting multiple disparate systems using different programming languages to communicate with one another.
通过提供一种公共语言，SQL简化了DBA、系统程序员、应用程序员、系统分析员和最终用户之间的通信。
By providing a common language, SQL eases communication among DBAs, systems programmers, application programmers, systems analysts, and end users.
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