They're both deflated by the Consumer Price Index or, in the case of the UK, the Retail Price Index to give us a real home price.

两地指数均扣除了消费者价格指数，谈到伦敦房价，零售物价指数能够反映实际房价。

Formation of retail price index aims to keep abreast of price fluctuation of retail commodities and provide the reference basis for the central government in working out economic policies.

其目的在于掌握商品价格的变动动态，为国家宏观调控提供参考依据。