基本解释蒸发异常英汉例句双语例句In the region with more actual evaporation, PDSI describes the severity of drought more precisely than percentage of precipitation anomaly.在实际蒸发较大的地区，PDSI指数比降水距平百分率描述干旱强度更准确。evaporation anomaly更多例句专业释义地球科学蒸发异常