常見例句雙語例句The results show that the biological nitrogen fixation is improved with the increase of C/N ratio.結(jié)果表明：肥料組合的C、N比越高，土壤微生物對肥料N的固定量越大。Nitrogen fixation trees of Leguminosae and non-Leguminosae are important biological nitrogen fixation resources.豆科及非豆科固氮樹種是重要的生物固N資源。The rhizobia taxonomy is one of the most important fields in bacteria systematics and biological nitrogen fixation.根瘤菌的分類作為生物固氮和細菌分類學兩個領(lǐng)域的結(jié)合點，具有十分重要的意義。 返回 biological fixation nitrogen