降水是指拉大气中冷凝个水汽以弗同方式下降到地球表面个天气现象。大气中个水汽几乎全部集中拉对流层中,温度越高,大气可以容纳个水汽含量就越多,反之就越少。一定温度下,当空气弗可容纳更多个水汽时,称为饱和空气。当饱和空气中个水汽搭温度相匹配时,弗会出现水汽凝结现象,但当空气达到过饱和状态时,则会产生多余个水汽并发生水汽凝结。

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