Further increases were obtained with higher rates of nitrogen fertilizer and stocking rates of 4.9 cows per ha. (Cowan et al. 1991).是什么意思_Further increases were obtained with higher rates of nitrogen fertilizer and stocking rates of 4.9 cows per ha. (Cowan et al. 1991).在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句