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温度更低时更通常下雪花还是雪粒

更新时间: 2020-10-09 00:00:00     

空中的温度低,经常在0℃以下。从地面蒸发的水蒸气上升到高空,就变成小冰晶,小冰晶又结成大冰晶。慢慢地冰晶越来越大,越来越重。终于,空气托不住了,它们就从天上落下来。当遇到地面附近的暖空气时,冰晶会融化成雨水。在寒冷的冬天,地面附近的空气很冷,所以冰晶不会融化,落到地上就是雪。

关键词: 温度 通常 雪花 还是 雪粒

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