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Fr st, the sun sh nes the ater, the ater becomes hot, the ater becomes vapour. The vapour goes up h gher and h gher, the vapour becomes cloud. The clouds become heav er and heav er, t becomes ra n. The ra n drops. They are cycle.
来 源 ao ue om
【How water cycle】相关文章:
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8.Water Pollution
9.Saving water