| 释义 |
nitrogen cycle 【化学】氮循环 以上来源于：《21世纪大英汉词典》 nitrogen cyclen.[the nitrogen cycle]① 【生物】氮循環nitrogen cyclen.【生】氮循环详细释义源自:《新世纪英汉大词典》Collins外研社 n.氮循环【生物学】英英释义n.the circulation of nitrogen; nitrates from the soil are absorbed by plants which are eaten by anim |