saturated gradient

例句：

1. 1.The saturation gradient is a critical factor in determining the distribution of pollutants in the environment.
   饱和梯度是决定环境中污染物分布的关键因素。
2. 2. In this study, we used a saturated gradient to simulate the effects of different levels of pollution on ecosystems.
   在这项研究中，我们使用饱和梯度来模拟不同污染水平对生态系统的影响。
3. 3. The saturation gradient is an important tool for predicting the performance of materials under different conditions.
   饱和梯度是预测材料在不同条件下性能的重要工具。