我国小型蒸发皿折算系数基本在0.6左右波动，变幅很小。
The conversion coefficient is stabilized about 0.6 and the change is small .
宁夏小型蒸发皿蒸发量存在明显的下降趋势，夏季是下降趋势最明显的季节，南部山区是最明显的区域。
The season with most obvious downtrend is summer , while the area with most obvious downtrend is the southern mountainous area in Ningxia .
小型蒸发皿