concentration index

例句：

1. 1. The concentration index of the pollutant is a critical factor in determining its impact on the environment.
   污染物的浓度指数是决定其对环境影响的关键因素。
2. 2.The study used the concentration index to measure the effectiveness of various treatment methods.
   该研究使用浓度指数来衡量各种治疗方法的有效性。
3. 3.The concentration index was calculated based on the data collected during the experiment.
   浓度指数是根据实验期间收集的数据计算得出的。