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单词 nitrogen fixation
释义
nitrogen fixation
n.
1. The conversion of atmospheric nitrogen into compounds, such as ammonia, by natural agencies or various industrial processes.
2. The conversion by certain soil microorganisms, such as rhizobia, of atmospheric nitrogen into compounds that plants and other organisms can assimilate.

nitro·gen-fixer (-fĭksər) n.
nitro·gen-fixing adj.
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