index of regional difference of consumer prices

例句：

1. 1. The index of inflation is a key indicator of economic health.
   通货膨胀指数是经济健康的关键指标。
2. 2. The index of regional difference of consumer prices is used to measure the price differences between different regions.
   消费者价格区域差异指数用于衡量不同地区的价格差异。
3. 3. The index of regional difference of consumer prices has been rising steadily over the past fewyears.
   消费者价格区域差异指数在过去几年里一直在稳步上升。