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1. Oxford Dictionary

   index number

   • n.
     a number showing the variation in a price or value compared with the price or value at a specified earlier time (often represented by the number 100)；a number giving the magnitude of a physical property or other measured phenomenon in terms of a standard

   • noun: index number, plural noun: index numbers

2. • 釋義

   n.

   名詞

   • 1. a number showing the variation in a price or value compared with the price or value at a specified earlier time (often represented by the number 100) the official index numbers of agricultural production show declining production
   • ▪ a number giving the magnitude of a physical property or other measured phenomenon in terms of a standard foods are assigned an index number from 1 to 100 (100 being pure glucose)