diffusion time

例句：

1. 1.The diffusion time of the gas is very short, allowing for rapid penetration.
   气体的扩散时间非常短，允许快速渗透。
2. 2. The diffusion time of the drug is crucial in determining its effectiveness.
   药物的扩散时间在决定其有效性方面至关重要。
3. 3.The diffusion time of the pollutant is a critical factor in assessing environmental impacts.
   污染物的扩散时间是评估环境影响的关键因素。