Examples
CCyǔ yán语言de的biàn liàng变量míng名shì是qū fēn区分dà xiǎo xiě大小写de的。
C语言的变量名是区分大小写的。
Variable names in C are case sensitive.
变量的声明在C和C++中极其重要。
Declarations of variables are extremely important in C and C++.
尽管参数的值可变，但我们仍把它视为常量，而非变量。
Even though a parameter's value can change, it is treated as a constant, not as a variable.