This derivation is not reversible and is a strict loss of information.

这种派生是不可逆的且是一种信息的绝对丢失。

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It is pointed out that in many textbooks, the derivation of the theorem that the ratio of heat to temperature amounts to zero in any reversible cycle is insufficiently exact and too excessively brief.

关于任一可逆循环热温比之和为零的推导，许多教材上的阐述存在着不够准确和过于简单的问题，本文提出一种比较严格的推导方法。

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