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  1. nitrogen fixation

    • IPA[ˈnītrəjən fikˈsāSHən]
    • n.
      the chemical processes by which atmospheric nitrogen is assimilated into organic compounds, especially by certain microorganisms as part of the nitrogen cycle.
    • noun: nitrogen fixation

    • 更多解釋
    • n.
      the chemical processes by which atmospheric nitrogen is assimilated into organic compounds, ...

    Oxford Dictionary