短語詞組短語nitrogen gas supply 氮?dú)夤┙onitrogen -supply 氮素a nitrogen gas supply 氮?dú)夤┙onitrogen supply pressure 供氮壓力soil nitrogen supply 土壤供氮NS Nitrogen supply 氮源mineral nitrogen supply 土壤氮供應(yīng)nitrogen supply strategy 補(bǔ)氮enhanced nitrogen supply 氮素增加 返回 nitrogen supply