A conforming implementation may have extensions (including additional library functions), provided they do not alter the behavior of any well-formed program.
只要这些扩展不会改变任何良好形式程序的行为，符合标准的实现就可以带有扩展(包括附加的库功能)。
A conforming implementation may have extensions (including additional library functions), provided they do not alter the behavior of any well-formed program.
只要这些扩展不会改变任何良好形式程序的行为，符合标准的实现就可以带有扩展(包括附加的库功能)。
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