年际间气象条件（特别是降雨）的差异性导致了水量平衡的差异性。
The annual fluctuation of the weather conditions, especially the rainfall, resulted in the fluctutation of the water budget.
利用1997～1999年逐日探空资料和同期水文水资源资料，分析了山东省域空中水汽资源的时空分布特征及地-气系统的水量平衡关系。
Using daily sounding data and water resources data from 1997-1999, the spatial-temporal characteristics and the water balance relations of land-atmosphere system are analyzed.
利用1997～1999年逐日探空资料和同期水文水资源资料，分析了山东省域空中水汽资源的时空分布特征及地-气系统的水量平衡关系。
Using daily sounding data and water resources data from 1997-1999, the spatial-temporal characteristics and the water balance relations of land-atmosphere system are analyzed.
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