二十四节气中有寒露、霜降,都在晚秋时节。自然科学常识告诉我们,露就是空气中的水分遇冷凝结成的水珠,而如果气温在零度以下,那么水珠就成为固态,也就是霜。露和霜,犹如雨和雪,一个近地面生成,一个生成后自空中落下。不过古代人没有我们的常识,他们本能地认为露和雪都是从天上掉下来的,所以就有了霜降一说。另外,露和霜形成的关键条件是气温,所以夏 Twenty-four solar terms in a dew, frost, all in the late autumn season. Natural science tells us that dew is the condensation of water in the air when the water droplets, and if the temperature below zero, then the water droplets become solid, that is, frost. Dew and cream, like rain and snow, a near-surface formation, a generation after falling from the air. However, ancient people did not have our common sense, they instinctively think that both the snow and the snow have fallen from the sky, so there is a frost said. In addition, the formation of the key conditions of dew and frost is the temperature, so summer