price index number

例句：

1. 1.The price index for this month has increased by 5% compared to last year.
   这个月的价格指数比去年同期上涨了5%。
2. 2.The government uses the price index to measure inflation.
   政府使用价格指数来衡量通货膨胀。
3. 3. The price index is an important indicator of economic growth.
   价格指数是衡量经济增长的重要指标。