index address

例句：

1. 1. The index of the stock market is closely watched by investors.
   投资者密切关注股市的指数。
2. 2. The index of the economy has been rising steadily for several months.
   经济指数已经连续几个月稳步上升。
3. 3. The index of the company's profits has fallen significantly in the past quarter.
   公司利润指数在过去一季度大幅下降。