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第345行：
第345行： − 热力学第二定律表明了自然过程的不可逆性，并且在许多情况下，自然过程的趋向于物质很能量的空间均匀性，特别是温度。它可以用各种有趣而重要的方式来表达。+ 第372行：
第372行： − 这种不可逆性的一个主要例子是通过传导或辐射进行的热传递。早在熵的概念被发现之前，人们就已经知道，当两个最初温度不同的物体直接进行热连接时，热量总是自发地从较热的物体流向较冷的物体。+ 第380行：
第380行： − + 第387行：
第387行： − 根据热力学第二定律，在理论上和假设的可逆传热中，传热元素δQ是系统和热源或热目的地的温度(t)与系统共轭变量熵（S）的增量(dS)的乘积+ 第393行：
第393行： − + + − 数学 delta q t ，dS ，. / math
→Second law
The second law of thermodynamics indicates the irreversibility of natural processes and, in many cases, the tendency of natural processes to lead towards spatial homogeneity of matter and energy, and especially of temperature. It can be formulated in a variety of interesting and important ways.
The second law of thermodynamics indicates the irreversibility of natural processes and, in many cases, the tendency of natural processes to lead towards spatial homogeneity of matter and energy, and especially of temperature. It can be formulated in a variety of interesting and important ways.
热力学第二定律表明了自然过程的不可逆性，并且在许多情况下，自然过程的趋向于物质和能量的空间均匀性，特别是温度。它可以用各种有趣而重要的方式来表达。
A prime example of irreversibility is in the transfer of heat by conduction or radiation. It was known long before the discovery of the notion of entropy that when two bodies initially of different temperatures come into thermal connection, then heat always flows from the hotter body to the colder one.
A prime example of irreversibility is in the transfer of heat by conduction or radiation. It was known long before the discovery of the notion of entropy that when two bodies initially of different temperatures come into thermal connection, then heat always flows from the hotter body to the colder one.
这种不可逆性的一个主要例子是通过传导或辐射进行的热传递。早在熵的概念被发现之前，人们就已经知道，当两个最初温度不同的物体直接进行热连接时，热量总是从较热的物体流向较冷的物体。
The second law tells also about kinds of irreversibility other than heat transfer, for example those of friction and viscosity, and those of chemical reactions.'''<font color="#32CD32"> The notion of entropy is needed to provide that wider scope of the law.</font>'''
The second law tells also about kinds of irreversibility other than heat transfer, for example those of friction and viscosity, and those of chemical reactions.'''<font color="#32CD32"> The notion of entropy is needed to provide that wider scope of the law.</font>'''
第二定律也告诉我们除了热传递之外的不可逆性，例如摩擦力和粘度，以及化学反应。'''<font color="#32CD32">需要熵的概念给该定律提供更广泛的范围。</font>'''
第二定律也告诉我们除了热传递之外的不可逆性，例如摩擦力和粘度，以及化学反应。'''<font color="#32CD32">该定律应给熵的概念提供更广泛的范围。</font>'''
According to the second law of thermodynamics, in a theoretical and fictive reversible heat transfer, an element of heat transferred, δQ, is the product of the temperature (T), both of the system and of the sources or destination of the heat, with the increment (dS) of the system's conjugate variable, its entropy (S)
According to the second law of thermodynamics, in a theoretical and fictive reversible heat transfer, an element of heat transferred, δQ, is the product of the temperature (T), both of the system and of the sources or destination of the heat, with the increment (dS) of the system's conjugate variable, its entropy (S)
根据热力学第二定律，在理论上和假设的可逆传热中，传热元素''δQ''是系统和热源或热目的地的温度(t)与系统共轭变量熵（S）的增量(dS)的乘积
:<math>\delta Q = T\,dS\, .</math><ref name="Guggenheim 1985"/>
:<math>\delta Q = T\,dS\, .</math><ref name="Guggenheim 1985"/>
<math>\delta Q = T\,dS\, .</math>
:<math>\delta Q = T\,dS\, .</math><ref name="Guggenheim 1985"/>