常見(jiàn)例句雙語(yǔ)例句Objective To study the fertilizer requirement characteristics of Polygala tenuifolia on nitrogen, phosphorous and potasium fertilizers to improve cultural practices in producing region.目的研究栽培遠(yuǎn)志對(duì)氮、磷、鉀的需肥特性，指導(dǎo)産區(qū)大田生産。 返回 nitrogen fertilizer requirement