d regions造句

• The space-time distribution of chinese semi-ari d region surface water is n't even, the differences in a year are obvious; the differences of underground water between years are not so obvious as surface water, but it still has a decreasing tendency, especially in shanxi and sha'anxi provinces . there is a significant linear correlation between the precipitation and water resources in semi-arid region, the dynamic regularity of water resources is basically same as the dynamic regularity of precipitation
  半干旱地区地表水资源时空分布不均匀，年内分配差别大，地下水资源年际间变化率不大，但总体有减少的趋势，尤以陕西和山西突出。半干旱地区降水量与水资源量线性相关显著，降水量的变化规律基本上与水资源量的变化规律吻合。