degenarative process

例句：

1. 1.The degeneration of the nerve cells isa common cause of chronic pain.
   神经细胞的退行性变化是慢性疼痛的常见原因。
2. 2. The study found that the degeneration of the heart muscle was acceleratedby high blood pressure.
   研究发现，高血压加速了心脏肌肉的退行性变化。
3. 3. The researchersproposed a new theory toexplain the degeneration of thebrain during aging.
   研究人员提出了一个新的理论来解释大脑在老化过程中的退行性变化。