一种大气状况，特征为气团均匀散布在某一地区上空，常伴随晴朗干燥天气。
A meteorological condition characterized by the uniform expansion in volume of a mass of air over a region, usually accompanied by fair dry weather.
一种大气状况，特征为气团均匀散布在某一地区上空，常伴随晴朗干燥天气。
A meteorological condition characterized by the uniform expansion in volume of a mass of air over a region, usually accompanied by fair dry weather.
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