真的？因此雨来自云！
对于多天天空，大气的向下发射被来自云本身的发射所加强。
In cloudy skies the downward emission of the atmosphere is augmented by radiation from the clouds themselves.
雨是形成当分开对来自云的地球表面的下降水秋天的坠落一个来源。
Rain is a source of precipitation which forms when separate drops of water fall to the Earth's surface from clouds.
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