degradation

过度使用化肥导致了土壤质量的退化。

Excessive use of fertilizers caused the ___degradation of soil quality.

被公开羞辱后，她深陷屈辱感中。

After being publicly shamed, she suffered from a deep sense of ___degradation.

这些细菌能加速有机物的降解过程。

These bacteria speed up the ___degradation of organic matter.