用于文档编制、编译器检查和代码分析的工具可以使用这些额外信息。

This additional information is used by tools for the purposes of documentation, compiler checking, and code analysis.

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一般来说，元数据的好处分为三类：文档编制、编译器检查和代码分析。

In general, metadata's benefits fall into three categories: documentation, compiler checking, and code analysis.

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“-M”选项指示编译器检查所有与编译文件相关联的文件。

The -M option instructs command-line compiler to check all units upon which the file being compiled depends.

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In a compiled language, you have an intermediate step, in which you take the source code, it runs through what's called a checker or a compiler or both, and it creates what's called object code.

而在编译语言里，你就会经过一个中间的步骤，在这种语言里输入源码后，先经过过滤器,或者编译器检查后，它会创建一个叫做目标代码的东西。

麻省理工公开课 - 计算机科学及编程导论课程节选