modulus of decay

例句：

1. 1. The rate of decay is acrucial factor in the life cycle of anorganism.
   衰减速率是生物生命周期中的关键因素。
2. 2.The decay of organic matter is a naturalprocess that occurs in all ecosystems.
   有机物质的降解是一种自然过程，在所有生态系统中都发生。
3. 3. The modulus of decaycan be used to calculate the lifespanof materials under specific conditions.
   衰减模数可以用来计算材料在特定条件下的使用寿命。