Effect of the Optimal Proportion of Nitrogen, Phosphorus and Potassium to Cotton Yield in Hexi Corridor Region of Gansu是什么意思_Effect of the Optimal Proportion of Nitrogen, Phosphorus and Potassium to Cotton Yield in Hexi Corridor Region of Gansu在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句