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A monograph on classical thermodynamics by H.A. Buchdahl considers the "equilibrium of a thermodynamic system", without actually writing the phrase "thermodynamic equilibrium". Referring to systems closed to exchange of matter, Buchdahl writes: "If a system is in a terminal condition which is properly static, it will be said to be in equilibrium." Buchdahl's monograph also discusses amorphous glass, for the purposes of thermodynamic description. It states: "More precisely, the glass may be regarded as being in equilibrium so long as experimental tests show that 'slow' transitions are in effect reversible." It is not customary to make this proviso part of the definition of thermodynamic equilibrium, but the converse is usually assumed: that if a body in thermodynamic equilibrium is subject to a sufficiently slow process, that process may be considered to be sufficiently nearly reversible, and the body remains sufficiently nearly in thermodynamic equilibrium during the process.

A monograph on classical thermodynamics by H.A. Buchdahl considers the "equilibrium of a thermodynamic system", without actually writing the phrase "thermodynamic equilibrium". Referring to systems closed to exchange of matter, Buchdahl writes: "If a system is in a terminal condition which is properly static, it will be said to be in equilibrium." Buchdahl's monograph also discusses amorphous glass, for the purposes of thermodynamic description. It states: "More precisely, the glass may be regarded as being in equilibrium so long as experimental tests show that 'slow' transitions are in effect reversible." It is not customary to make this proviso part of the definition of thermodynamic equilibrium, but the converse is usually assumed: that if a body in thermodynamic equilibrium is subject to a sufficiently slow process, that process may be considered to be sufficiently nearly reversible, and the body remains sufficiently nearly in thermodynamic equilibrium during the process.

H.A. Buchdahl的一本关于经典热力学的专著考虑了热力学系统的平衡，而实际上并没有写热力学平衡一词。Buchdahl在提到封闭的物质交换系统时写道: “如如果一个系统处于一个适当的静态状态，那么它将被称为处于平衡状态。”出于热力学描述的目的，Buchdahl的专著也讨论了非晶态玻璃。它说: “更准确地说，只要实验测试表明‘慢’跃迁实际上是可逆的，玻璃就可以被认为处于平衡状态。”将这一条件作为热力学平衡定义的一部分并不习惯，而是常常假定相反的情况：如果热力学平衡中的一个体受到足够慢的过程的影响，则该过程可被视为足够接近可逆，并且该物体在过程中足够接近热力学平衡。

H.A. Buchdahl的一本关于经典热力学的专著考虑了热力学系统的平衡，而实际上并没有写热力学平衡一词。Buchdahl在提到封闭的物质交换系统时写道: “如果一个系统处于一个适当的静态状态，那么它将被称为处于平衡状态。”出于热力学描述的目的，Buchdahl的专著也讨论了非晶态玻璃。它说: “更准确地说，只要实验测试表明‘慢’跃迁实际上是可逆的，玻璃就可以被认为处于平衡状态。”通常来说不会将这一条件作为热力学平衡定义的一部分，而是假定相反的情况：如果热力学平衡中的一个体受到足够慢的过程的影响，则该过程可被视为足够接近可逆，并且该物体在过程中足够接近热力学平衡。