A consumer price index (CPI) measures changes in the price level of consumer goods and services purchased by households.
CPI，也就是Consumer Price Index，消费者物价指数，用来衡量消费者购买消费品和服务时的价格水平。
The annual percentage change in a CPI is used as a measure of inflation.
一年CPI的百分比变化是政府用来衡量inflation（通货膨胀）的一个重要指数。
The CPI is a statistical estimate constructed using the prices of a sample of representative items whose prices are collected periodically.
CPI是一项数据评估，通过周期性地获取某一个代表性的产品的价格来构建。
A CPI can be used to index (i.e., adjust for the effect of inflation) the real value of wages, salaries, pensions, for regulating prices and for deflating monetary magnitudes to show changes in real values.
CPI指数用来调整通货膨胀的影响，标志着月俸、薪水、补贴等的真实价值。政府可以规范价格，紧缩货币量等手段表现这些真实价值的变化。
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