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人类能感知的温度很有限．一般人觉得不冷不热的水的温度大约是37℃,觉得很烫的水的温度是60℃以上．人体温度的变化一般不会低于35℃,也不会高于42℃,正常体温是37℃．人体觉得最舒适的环境温度为20～28℃,而对人体健康最理想的温度是18℃左右．平时饮水、饮食、漱口的最佳温度是35～38℃,这样对口腔、牙齿刺激最小．洗澡时水的最佳温度是34～36℃．洗头水的最佳温度为50～60℃．洗脸水的最佳温度:夏季为8～20℃,冬季为30～50℃．洗脚水的最佳温度为45～60℃．
The temperature that humans can sense is limited. Most people think that the temperature of lukewarm water is about 37°C, and that the temperature of very hot water is more than 60°C. Changes in human body temperature will generally not be less than 35 °C, nor higher than 42 °C, normal body temperature is 37 °C. The human body feels the most comfortable ambient temperature is 20 ~ 28 °C, and the ideal temperature for human health is about 18 °C. Normal drinking water, diet, rinse the best temperature is 35 ~ 38 °C, so that the oral, dental stimulation is minimal. The best temperature for water in the bath is 34~36°C. The optimum temperature of shampoo is 50~60°C. The best temperature for face wash: 8 to 20°C in summer and 30 to 50°C in winter. The best temperature for foot washing is 45～60°C.