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.
XML 是用于 Web 服务组件之间的通信的语言。
XML is the language that is used for communication between Web service components.
但基本的概念仍类似于上述人与人之间的谈话的概念，只不过这里是应用程序使用共同的语言进行通信，且通常会跨越某种网络。
But the concept is still similar to that of a conversation with the applications communicating, using a common language and often across a network of some sort.
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