Research on the Soil Water and Salt Dynamics of the Purple Medic Grassland and the Mode of an Optimal Ecological Irrigation Control in the Qinwangchuan Irrigated Regions, Gansu Province是什么意思_Research on the Soil Water and Salt Dynamics of the Purple Medic Grassland and the Mode of an Optimal Ecological Irrigation Control in the Qinwangchuan Irrigated Regions, Gansu Province在线翻译_英语_读音_用法_例句