冰是大自然的产物,当气温低于摄氏零度时,水就会凝结成冰。早在3000多年前,我们的祖先就知道用冰来调节气温,《诗经》里就有“二之日凿冰冲冲,三之日纳于凌阴”之句,凌阴就是冰室。古时设有专门官员,负责“冬季取冰,藏于凌阴,为消夏之用”。后来又知道用冰冷藏食物。 Ice is the product of nature, when the temperature is below zero degrees Celsius, the water will condense into ice. As early as 3000 years ago, our ancestors knew that the temperature was adjusted with ice. There is “The Book of Songs” where there is an ice snuffing in the two days and the three days in the Lingyin. Lingyin is the ice room. In ancient times with specialized officials, responsible for “winter ice, hidden in Lingyin, Xia summer use.” I later learned to use ice-cold food.