It just means pages sewn together and placed within the covers of a book.

意思是连起来的张页,外面是抄本封面。

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In his book Utilitarianism, Mill tries to show that critics to the contrary it is possible within the utilitarian framework to distinguish between higher and lower pleasures.

在穆勒的《功利主义》中，他试图证明，与批判者所言相反,在功利主义的框架下,是能区分高级和低级快乐的。

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