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.

youdao

现在，我们可以通过检查一些代码来查看GWT编译器是如何优化代码的。

Now we can take a look at some code to see how the GWT compiler optimizes it.

youdao

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.

youdao

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