Effects of Exogenous Spd on NO_3~--N,NH_4~+-N Contents and Nitrate Reductase Activity of Salt Stressed Leaves and Roots of Cucumber Seedlings是什么意思_Effects of Exogenous Spd on NO_3~--N,NH_4~+-N Contents and Nitrate Reductase Activity of Salt Stressed Leaves and Roots of Cucumber Seedlings在线翻译_英语_读音_用法_例句