comparative density index

例句：

1. 1. The researchers used the comparative density index to compare the data from different sources.
   研究人员使用比较密度指数来比较不同来源的数据。
2. 2. The company's comparative density index is a key indicator of its financial performance.
   公司的比较密度指数是其财务表现的关键指标。
3. 3. The new model has a higher comparative density index than the previous one.
   新模型的比较密度指数比旧模型高。