名词中文翻译
中文翻译：索引
同义词：
['rank', 'key', 'point', 'measure', 'criterion']
例句：
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1. The indexof the stock market is closely watched byinvestors.
投资者密切关注股市的指数。
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2. The indexof the economy has been rising steadily sincethe beginning of the year.
自年初以来，经济指数一直在稳步上升。
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3. The indexof happiness is a measure of how muchpeople are satisfied with their lives.
幸福指数是衡量人们生活满意度的一个指标。