风中有朵雨做的云,一朵雨做的云,云的心里全都是雨……孟庭苇的《风中有朵雨做的云》不仅唱出人们哀婉、多情的思绪,也暗合了大自然界的水循环。地球上不同地方上的水,可以通过吸收太阳的能量,变成水蒸气飘到空中,从而到达地球上另外一个地方。地球上的水资源,尤其淡水资源分布很不均衡。在热带雨林,河流湖泊纵横交错;而在荒漠、戈壁, There is a cloud of rain in the wind, a cloud of rain, all in the heart of the cloud rain ... ... Meng Tingwei’s “There is a cloud of rain in the wind” not only sings people’s sad and sentimental thoughts, Water circulation in nature. Water on different parts of the earth can be absorbed by the sun’s energy into water vapor to reach the air to reach another part of the earth. The distribution of water resources on Earth, especially freshwater, is uneven. In the tropical rain forests, rivers and lakes criss-cross; and in the desert, Gobi,