这是因为实际的源代码和变量绑定可以更改，这是建立在环境或者构建宏预处理程序指令的时间定义的基础上的。
This is because the actual source code and the variable binding can change, based on the environment or the build time definitions of macros and preprocessor commands.
编译的预处理阶段对程序文本进行宏替换，包含进其他源文件，并进行条件编译。
A preprocessing step performs macro substitution on program text, inclusion of other source files, and conditional compilation.
对超高分辨率显示适配器的驱动程序和用8087宏汇编实现预处理的编程方法也进行了讨论。
The driving program of super-resolution display adapter and the programming method of processing program with 8087 macroassembler are discussed as well.
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