温度在线换算工具：任意温度单位之间可以互相转换
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)
