Adapter基类将Adapter特定的Record对象发送到函数选择器。

The Adapter base classes send the Adapter-specific Record object to the Function Selector.

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这些选择器应当只由基类实现调用；故此，我们将其声明放进结构头文件而不是接口头文件中。

These selectors should only be called by a subclass implementation; therefore, we include their declarations into the representation file and not into the interface file.

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这些选择器应当只由基类实现调用；

These selectors should only be called by a subclass implementation;

youdao

这些选择器应当只由基类实现调用；

These selectors should only be called by a subclass implementation;

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