On the other hand, if a defined global symbol exists, the appearance of a weak symbol with the same name will not cause an error.

另一方面，如果一个已定义的全局符号存在，则即便另一个具有相同名字的弱符号存在也不会引起错误。

youdao

In fact function definitions are also 'statements' that are' executed '; the execution enters the function name in the module's global symbol table.

事实上函数定义既是“声明”又是“可执行体”；执行体由函数在模块全局语义表中的命名导入。

youdao