This is my way to do variable amplifier, signal amplification, and hope to help everyone.
这是我做的可变程放大器，放大信号用，希望对大家有帮助。
The reason has to do with variable scoping; see the Sidebar for a full explanation.
原因与变量的范围有关；参阅侧栏中的完整说明。
What do I now want to do with this variable?
我要这变量干什么呢？
All you need to do is set an environment variable.
只需要设置环境变量。
How do I properly declare a global variable in a header file?
我应该怎样声明一个全局变量在头文件中？
A structure allows you to do this in a single variable.
结构允许在单个变量中实现。
How do you get variable substitution to do exactly what you want?
如何才能进行你想要的变量替换？
How do you get variable substitution to do exactly what you want?
如何才能进行你想要的变量替换？
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