不过一定要记住，不能只使用原型，因为仅仅用原型是不足以表达底层的模式风格、原则和基本原理，这些都是要和程序交流的很重要的内容。
However, keep in mind that prototypes alone are rarely sufficient to communicate underlying patterns, principles, and rationale, which are vital concepts to communicate to programmers.
如果应用程序无法交流，则用户将不知道到底发生了什么事情。
If the application fails to communicate, it might leave users unsure about what is actually happening.
每一个 MySQL 数据库系统都会通过一个端口与其他的程序相交流。
Each MySQL database system communicates over a port with other applications.
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