不过它通过删除不同的关键字来显示使用此函数的某些可能性并且返回字符串的总字数。

It shows some potential for using the function but by removing the distinct keyword, it returns the total word count of a string.

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UNIX 的设计由大量的函数调用（称为系统调用）组成，其中包括一些简单的任务，如在屏幕上显示字符串来设置任务优先级。

The UNIX design consists of hundreds of function calls (called system calls) covering simple tasks, such as displaying a character string on the screen to setting task priorities.

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puts函数在控制台上显示一个字符串。

The puts function displays a string on the console.

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