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The total entropy of a system and its surroundings can remain constant in ideal cases where the system is in thermodynamic equilibrium, or is undergoing a (fictive) reversible process. In all processes that occur, including spontaneous processes, the total entropy of the system and its surroundings increases and the process is irreversible in the thermodynamic sense. The increase in entropy accounts for the irreversibility of natural processes, and the asymmetry between future and past.
The total entropy of a system and its surroundings can remain constant in ideal cases where the system is in thermodynamic equilibrium, or is undergoing a (fictive) reversible process. In all processes that occur, including spontaneous processes, the total entropy of the system and its surroundings increases and the process is irreversible in the thermodynamic sense. The increase in entropy accounts for the irreversibility of natural processes, and the asymmetry between future and past.
系统及其周围环境的总熵在理想情况下可以保持不变，在这种情况下，系统处于热力学平衡状态，或者正在经历一个(<font color = 'red'>虚拟的</font><font color = 'blue'>假想的</font>)可逆过程。在所有发生的过程中，包括自发过程，系统及其周围环境的总熵增加，这一过程在热力学意义上是不可逆的。熵的增加解释了自然过程的不可逆性，以及未来和过去之间的不对称性。
系统及其周围环境的总熵在理想情况下可以保持不变，在这种情况下，系统处于热力学平衡状态，或者正在经历一个(<font color = 'red'>虚拟的</font><font color = 'blue'>假想的</font>)可逆过程。<font color = 'red'><s>在所有发生的</s></font><font color = 'blue'>所有</font>过程中，包括'''自发过程 Spontaneous Processes'''，系统及其周围环境的总熵增加，这一过程在热力学意义上是不可逆的。熵的增加解释了自然过程的不可逆性，以及未来和过去之间的不对称性。
The second law has been expressed in many ways. Its first formulation is credited to the French scientist Sadi Carnot, who in 1824 showed that there is an upper limit to the efficiency of conversion of heat to work in a heat engine. This aspect of the second law is also known as Carnot's rule or limit.
The second law has been expressed in many ways. Its first formulation is credited to the French scientist Sadi Carnot, who in 1824 showed that there is an upper limit to the efficiency of conversion of heat to work in a heat engine. This aspect of the second law is also known as Carnot's rule or limit.
<font color = 'blue'>热力学第二定律可以使用多种方法表述。它的第一个公式归功于法国科学家'''卡诺Sadi Carnot'''，卡诺在1824年证明了在热机中将热转化为功的效率有一个上限。第二定律的这个方面也被称为卡诺规则'''Carnot's Rule'''或'''卡诺限制Carnot's Limit'''。</font>
'''热力学第二定律 Second Law of Thermodynamics'''是热力学的四条基本定律之一，它表述了热力学过程的不可逆性——孤立系统自发地朝着热力学平衡方向（即最大熵状态）演化，另一种表述为：第二类永动机永不可能实现。
'''热力学第二定律 Second Law of Thermodynamics'''是热力学的四条基本定律之一，它表述了热力学过程的不可逆性——孤立系统自发地朝着热力学平衡方向（即最大熵状态）演化，另一种表述为：第二类永动机永不可能实现。
--[[用户:嘉树|嘉树]]（[[用户讨论:嘉树|讨论]]）这里是不是少了一段文字？