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单词	nitrogen cycle
释义	nitrogen cycle noun : a continuous series of natural processes by which nitrogen passes successively from air to soil to organisms and back to air or soil involving principally nitrogen fixation, nitrification, decay, and denitrification Example Sentences Recent Examples on the Web Biology students may remember learning the water cycle, the carbon cycle or the nitrogen cycle. Alex Fox, Smithsonian Magazine, 15 Apr. 2021 Among that sediment was cyanobacteria, microorganisms capable of photosynthesis and an important player in the nitrogen cycle. Scottie Andrew, CNN, 4 Feb. 2020 Doolittle illustrates the idea using the nitrogen cycle. Quanta Magazine, 20 Nov. 2018 Word History First Known Use 1906, in the meaning defined above Kids Definition nitrogen cycle noun : a continuous series of natural processes by which nitrogen passes from air to soil to living things and back into the air Medical Definition nitrogen cycle noun : a continuous series of natural processes by which nitrogen passes through successive stations in air, soil, and organisms and which principally involves nitrogen fixation, nitrification, decay, and denitrification
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