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[[File:Heat flow hot to cold.png|thumb|upright|Heat flow from hot water to cold water. 热总是从热水流向冷水]]

[[File:Heat flow hot to cold.png|thumb|upright|Heat flow from hot water to cold water. 热总是从热水流向冷水]]

The zeroth law of thermodynamics in its usual short statement allows recognition that two bodies in a relation of thermal equilibrium have the same temperature, especially that a test body has the same temperature as a reference thermometric body. For a body in thermal equilibrium with another, there are indefinitely many empirical temperature scales, in general respectively depending on the properties of a particular reference thermometric body. The second law allows a distinguished temperature scale, which defines an absolute, thermodynamic temperature, independent of the properties of any particular reference thermometric body.

The zeroth law of thermodynamics in its usual short statement allows recognition that two bodies in a relation of thermal equilibrium have the same temperature, especially that a test body has the same temperature as a reference thermometric body. For a body in thermal equilibrium with another, there are indefinitely many empirical temperature scales, in general respectively depending on the properties of a particular reference thermometric body. The second law allows a distinguished temperature scale, which defines an absolute, thermodynamic temperature, independent of the properties of any particular reference thermometric body.

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热力学第零定律是指如果两个热力学系统<font color='red'><s>中的每一个</s></font>都与第三个热力学系统处于热平衡(温度相同)<font color= 'blue'>状态</font>，则它们彼此也必定处于热平衡<font color= 'blue'>状态</font>。热力学第零定律在<font color='red'><s>它</s></font>这个<font color= 'blue'></font><font color='red'><s>通常的</s></font>简短叙述中让人们认识到热平衡关系中的两个物体具有相同的温度，特别是当一个被测物体与一个参考测温物体具有相同的温度时，对于<font color='red'><s>一个与另一个</s></font>两个<font color= 'blue'></font>处于热平衡<font color= 'blue'>状态</font>的物体，有无限多的'''<font color = '#ff8000'>经验温标empirical temperature scales</font>'''，这通常<font color= 'blue'>分别</font>取决于特定参考温度<font color='red'><s>标度</s></font><font color= 'blue'>体</font>的性质。热力学第二定律允许区分'''<font color = '#ff8000'>温度标度temperature scale</font>'''，它定义了一个绝对的热力学温度，与任何特定的参考温度体的性质无关。

热力学第零定律是指如果两个热力学系统都与第三个热力学系统处于热平衡(温度相同)状态，则它们彼此也必定处于热平衡状态。热力学第零定律在它这个简短叙述中让人们认识到热平衡关系中的两个物体具有相同的温度，特别是当一个被测物体与一个参考测温物体具有相同的温度时，对于两个处于热平衡状态的物体，有无限多的'''<font color = '#ff8000'>经验温标empirical temperature scales</font>'''，这通常取决于特定参考温度体的性质。热力学第二定律允许区分'''<font color = '#ff8000'>温度标度temperature scale</font>'''，它定义了一个绝对的热力学温度，与任何特定的参考温度体的性质无关。

 

==Various statements of the law热力学第二定律的不同表述==

==Various statements of the law热力学第二定律的不同表述==