短語(yǔ)詞組短語(yǔ)net photosynthetic ratio 凈光合速率net photosynthetic ratio pn 凈光合速率maximum photosynthetic ratio 最大光合速率photosynthetic potential grain ratio 勢(shì)粒比Photosynthetic potential -grain ratio 勢(shì)粒比 返回 photosynthetic ratio