index

/ˈɪndɛks/

a numerical scale used to compare variables with one another or with some reference number

中文释义：指数；指标

The consumer price index rose by 2% last month, indicating higher inflation.

上个月消费者价格指数上涨了2%，表明通货膨胀加剧。

Researchers use a happiness index to measure well-being across different countries.

研究人员使用幸福指数来衡量不同国家的福祉。