atenuation characteristic

例句：

1. 1. The rate of atenuation is slowing down.
   衰减速率正在减缓。
2. 2. The sun's intensity attenuated as it approached the horizon.
   太阳接近地平线时强度减弱了。
3. 3.The population has been attenuating steadily since the introduction of vaccinations.
   自从引入疫苗接种以来，人口一直在稳步减少。