要实现这种功能，我们可以在yyltype类型的全局变量yylloc中提供这个符号的确切位置。
To do this, provide exact token locations in the global variable yylloc of type YYLTYPE.
击球技巧是一种反应，包括击球手不能控制的一系列变量，例如投球的类型、速度和位置。
The skill of hitting is a reaction, involving a series of variables that the batter cannot control, such as the type, speed, and location of the pitch.
内置类型变量是否自动初始化取决于变量定义的位置。
Whether a variable of built-in type is automatically initialized depends on where it is defined.
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