fill nitrogen preservation

例句：

1. 1.The process of filling nitrogen preservation is crucial for the survival of many organisms.
   填充氮保存的过程对于许多生物的生存至关重要。
2. 2.In order to preserve the environment, it's important to reduce the use of nitrogen-based fertilizers.
   为了保护环境，减少氮肥的使用是很重要的。
3. 3.The research on nitrogen preservation has shown that it can effectively reduce soil erosion and improve crop yields.
   关于氮保存的研究显示，它可以有效地减少土壤侵蚀并提高作物产量。