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近年来,世界各地都出现了干旱少雨的情况,一些非洲国家甚至连水都没得喝。一些聪明的发明家们开始思考,如果水资源可以像空气那样取之不尽、用之不竭就好了,于是,他们突发奇想,想找无处不在的空气要些水来喝。向空气要水喝,这听上去似乎有些天方夜谭。实际上,其中原理也不难理解。在晴朗无云的夜晚,地面上的花草、石块将白天吸收到的热量迅速散发出去,再加上它们本身的温度又比周围的空气低,当较热的空气碰到这些温度较低的物体时便会在其表面凝结成露水。
In recent years, there has been aridity and lack of rain all over the world. Some African countries do not even have to drink water. Some clever inventors are beginning to think that if water can be as inexhaustible as the air, then inexhaustible, so they whim, looking for the ubiquitous air to drink some water. To the air to drink water, it sounds like some fantasy. In fact, the principle is not hard to understand. On a clear, cloudless night, the flowers and stones on the ground quickly dissipate the heat they absorb during the daytime. In addition, the temperature itself is lower than the ambient air. When the hot air hits these lower temperature Objects will condense to dew on their surfaces.