attenuation curve

例句：

1. 1. The attenuation curve shows the rate at which the virus spreads through the population.
   衰减曲线显示了病毒通过人口传播的速度。
2. 2.The attenuation curve was used to estimate the effectiveness of the vaccine.
   衰减曲线被用来估计疫苗的有效性。
3. 3.The attenuation curve helps us understand how the disease progresses over time.
   衰减曲线帮助我们理解疾病随时间进展的情况。