近50年来淮河流域降水时空变化特征分析_水利工程 关键词：淮河流域;降水量;旱涝;时空变化 [gap=1868]Key words:Huaihe river;precipitation;drought and flood;spatial and temporal variations
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temporal and spatial variations 时间和空间变化
Spatial and temporal variations in the air movement are desirable for fresh environments.
空气运动随空间和瞬时而变化是新鲜环境的要求。
The analysis of spatial and temporal variations of air temperature, precipitation, and sunshine hours will be helpful to rational prediction of changes in climate, and corresponding decision-making.
对温度、降水和日照时数时空变化规律的分析有助于对未来气候变化做出合理的预测，并制定相应的对策。
Objective To analyze the temporal and spatial variations of radon concentration by measuring in some LABS and typical buildings in Chengdu.
目的通过对成都某几个氡气观测实验室以及代表性建筑物的氡浓度测量，分析氡浓度的时间变化特点和垂直变化特点。
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