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柯林斯词典
1. N a statistic indicating the relative change occurring in each successive period of time in the price, volume, or value of a commodity or in a general economic variable, such as the price level, national income, or gross output, with reference to a previous base period conventionally given the number 100 指數; 反映一段時間內特定商品價格、國內收入等經濟變量相對前一堦段的變化[statistics]
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