Derived classes for methods that do not produce results. 不要為不產(chǎn)生結果的方法定義任何。
Both the underlying theory and the procedures used to produce results must be generally accepted by scientists in the relevant fields. 基本的理論和用于產(chǎn)生結果的程序都必須得到相關(guān)領(lǐng)域科學(xué)家的普遍接受。