天气酷热 ,人们经常大汗淋漓 ,衣服上时常沾上汗水 ,此时切忌用热水来洗。原因是汗水中除含有大量的水分和少量的盐分外 ,尚含有蛋白质、尿素与其它有机物质。盐分、尿素都溶于水 ,只需用大量的清水一揉 ,盐分、尿素就差不多可以洗掉。而蛋白质在一般温度下能以胶体的形态溶解 The weather is very hot, people often sweat, clothes often stained with sweat, this time avoid using hot water to wash. The reason is that in addition to sweat contains a lot of water and a small amount of salt, it still contains protein, urea and other organic substances. Salt, urea are soluble in water, just rubbing a lot of water, salt, urea can be washed almost. Proteins can be dissolved in colloidal form at normal temperatures