nitrogen fixation process

例句：

1. 1.The process of nitrogen fixation is crucial for plant growth.
   固定氮化过程对于植物生长至关重要。
2. 2.In this process, the bacteria convert atmospheric nitrogen into ammonia.
   在这一过程中，细菌将大气中的氮转化为氨。
3. 3. The process of nitrogen fixation is essential for maintaining soil fertility.
   固定氮化过程对于保持土壤肥力至关重要。