phosphor saturation

例句：

1. 1. The soil's phosphorus saturation level is critical for plant growth.
   土壤的磷饱和水平对植物生长至关重要。
2. 2. The researcher found that the phosphorus saturation in the lake water was high.
   研究者发现，该湖水的磷饱和度很高。
3. 3.The agricultural experts recommended increasing the phosphorus saturation in fertilizers to enhance crop yields.
   农业专家建议增加肥料中的磷饱和度以提升作物产量。