nitrogen cycle [土壤] 氮循环 ; 氮素循环 ; 氮化合物循环 ; 氮轮回
the nitrogen cycle 氮循环 ; 氮素循环 ; 循环
nitrogen cycle bacteria 氮循环茵 ; 氮循环菌
carbon nitrogen cycle 碳循环 ; 碳
carbon-nitrogen cycle [天物] 碳氮循环
soil carbon and nitrogen cycle 土壤碳和氮循环
biogeochemical nitrogen cycle 生物地球化氮循环
nitrogen-cycle 氮循环
soil nitrogen cycle 氮素循环
global nitrogen cycle 全球氮循环
You said that the nitrogen cycle is also an important nutrient cycle.
你说了，氮循环也是一个重要的营养循环。
The three most important nutrient recycles are the nitrogen cycle, the carbon cycle and the one we are going to talk about today, the Phosphorus cycle.
这三种最重要的营养循环包括氮循环、碳循环和我们今天要讲的磷循环。
There would be nowhere near as many people doing all sorts of other things to the planet if humans had not sped the nitrogen cycle up.
如果人类没有加速氮循环的速度，那么就远不会有众多人对地球上做其他的各种事情。
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