• 1. cycle of nitrogen: 氮循环
• 2. chemical cycle of nitrogen: 氮化学循环
• 3. cycle e of nitrogen: 氮循环

更多释义

• 1.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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• 2.It is also worth noting that unlike many of humanity's other effects on the planet, the remaking of the nitrogen cycle was deliberate.
  还值得注意的是，与地球上其他人类的影响不同，对于氮循环的再改造是故意的。
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• 3.No Dickensian insights are necessary to appreciate the scale of human intervention in the nitrogen cycle.
  在理解人类对氮循环的干扰力度方面，并非是杞人忧天。
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