absolute gradient

例句：

1. 1. The graph shows the absolute gradient of the temperature with altitude.
   图表显示了温度随海拔变化的绝对梯度。
2. 2.In this study, we calculated the absolute gradient of the soil moisture content.
   在这项研究中，我们计算了土壤湿度含量的绝对梯度。
3. 3. The researcher found that the absolute gradient in the distribution of species was not uniform across the landscape.
   研究者发现物种分布的绝对梯度在整个景观中并不均匀。