external function

• 外部函数

external function的用法和样例：

例句

1. It is called before the external function call has been properly initialized.
   在外部函数调用已正确初始化之前调用它。
2. This header file handles the platform-dependent features of external function prototypes.
   此头文件处理外部函数原型的平台相关的功能。