再进一步写成 dI/dNb - 2Nb = 0, dU/dSb - 2Sb = 0, 就可以和麦克斯韦方程比美了 :-)

来源: papyrus 于 2021-09-23 12:15:01 [旧帖] [给我悄悄话] 本文已被阅读：次

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