the continuous circulation of nitrogen and nitrogen-containing compounds from air to soil to living organisms and back to air, involving nitrogen fixation, nitrification, decay, and denitrification
| 单词 | nitrogen cycle |
| 释义 | nitrogen cyclenounthe continuous circulation of nitrogen and nitrogen-containing compounds from air to soil to living organisms and back to air, involving nitrogen fixation, nitrification, decay, and denitrification |
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