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''"::It is impossible to construct an engine which will work in a complete cycle, and produce no effect except the raising of a weight and cooling of a heat reservoir.<ref[Max Planck (1897/1903), p. 86.</ref><ref>Roberts, J.K., Miller, A.R. (1928/1960), p. 319.</ref>"

:''"It is impossible to construct an engine which will work in a complete cycle, and produce no effect except the raising of a weight and cooling of a heat reservoir.<ref[Max Planck (1897/1903), p. 86.</ref><ref>Roberts, J.K., Miller, A.R. (1928/1960), p. 319.</ref>"

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''"不可能建造一台发动机，使其在一个完整的循环中工作，并且除了提高重量和冷却热储以外不会产生任何效果。<ref>Max Planck (1897/1903),"[https://archive.org/stream/treatiseonthermo00planrich#page/100/mode/2up ''Treatise on Thermodynamics'', translated by A. Ogg, Longmans Green, London, p. 100.] p. 86.</ref><ref>Roberts, J.K., Miller, A.R. (1928/1960), p. 319.</ref>

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=== 开尔文表述与普朗克命题的关系 Relation between Kelvin's statement and Planck's proposition===

=== 开尔文表述与普朗克命题的关系 Relation between Kelvin's statement and Planck's proposition===