例句與造句

1. Through field experiment on various maize hybrids , planting densities and n application rates , hybrid " yedan 12 ” attained a maximum yield of 9273 kg / ha with a net output value of us $ 879 . 0 . 1 / ha and a ratio of output to input by 3 . 1
   通過對(duì)不同雜交玉米品種，種植密度和施氮量的大田試驗(yàn)，得到掖單12最高產(chǎn)量9273公斤/公頃，產(chǎn)值879 . 01美元/公頃和產(chǎn)投比3 : 1 。
2. It's difficult to find net output value in a sentence. 用net output value造句挺難的