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k=5/9(°f 459.67) k = ℃ 273.15 n°f= [(n-32)×5/9]℃ n℃= (9/5×n 32)°f 1℃= 9/5°f 32°f 1°f=5/9℃-32×5/9℃ f=9/5c 32,或c=5/9(f-32)