| 单词 | nitrogen fixation | 
| 释义 | Word Frequency nitrogen fixationnoun 1.  the conversion of atmospheric nitrogen into nitrogen compounds by certain bacteria, such as Rhizobium in the root nodules of legumes  2.  a process, such as the Haber process, in which atmospheric nitrogen is converted into a nitrogen compound, used esp for the manufacture of fertilizer  Derived formsnitrogen-fixing (ˈnitrogen-ˌfixing) adjective | 
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