chemogradient

例句：

1. 1.The chemical gradient in the soil can affect plant growth.
   土壤中的化学梯度会影响植物生长。
2. 2. The researchers found that the chemical gradient in the ocean is changing rapidly.
   研究人员发现海洋中的化学梯度正在迅速变化。
3. 3. The study focused on the chemical gradient between different regions of the earth's surface.
   该研究关注地球表面不同区域之间的化学梯度。