decay process

例句：

1. 1. Thedecaying tree is a symbol of the passing of time.
   逐渐枯萎的树象征着时间的流逝。
2. 2. The chemical reaction that leads to decay is known as autolysis.
   导致衰变的反应被称为自溶。
3. 3. The study of decay processes helps us understand how matter changes over time.
   研究衰变过程有助于我们理解物质随时间变化的过程。