nitrogen supply unit

例句：

1. 1.The plant requires a specific amount of nitrogen to grow properly.
   植物需要特定量的氮来正常生长。
2. 2.The manufacturer claims that their nitrogen supply unit is environmentally friendly.
   制造商声称他们的氮供应单元是环保的。
3. 3.The research team found that the nitrogen supply unit in the fertilizer was not sufficient for the plants' needs.
   研究团队发现，这种肥料中的氮供应单元不足以满足植物的需求。