These declarations should be made at the class level (not within an individual function definition).
These declarations should be made at the class level (not within an individual function definition).
这些声明应该在类一级（不是在单独的一个函数定义中）。
These declarations should be made at the class level (not within an individual function definition).
这些声明应该在类一级（不是在单独的一个函数定义中）。