| 单词 | nitrogen fixation |
| 释义 | nitrogen fixation [`nī·trǝ·jǝn ´fik¦sā·shǝn] CHEMICAL ENGINEERING Conversion of atmospheric nitrogen into compounds such as ammonia, calcium cyanamide, or nitrogen oxides by chemical or electric-arc processes. MICROBIOLOGY Assimilation of atmospheric nitrogen by heterotrophic bacteria. Also known as dinitrogen fixation. |
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