Two alfalfa varieties(Medicago sativa L.cv.Algonquin,M.sativa L.cv.Longdong) were used for systematical investigation of Rhizobium effectiveness and analysis of influencing factors in spring,summer,and autumn in 5 ecological regions of Gansu province.是什么意思_Two alfalfa varieties(Medicago sativa L.cv.Algonquin,M.sativa L.cv.Longdong) were used for systematical investigation of Rhizobium effectiveness and analysis of influencing factors in spring,summer,and autumn in 5 ecological regions of Gansu province.在线翻译_英语_读音_用法_例句