The central parity price closed at one U. S. dollar for 7.8141 yuan, the lowest of the year.

重要的汇率价停留在1美元对7.8141人民币，这是全年最低的汇兑比率。

The index is based on the idea of purchasing-power parity (PPP), which says currencies should trade at the rate that makes the price of goods the same in each country.

指数在购买力平价（PPP）这一概念基础上产生，购买力平价是指货币应以使商品价格在各个国家保持一致的汇率兑换。

The Big Mac Index is based on the theory of purchasing-power parity (PPP), which says that exchange rates should move to make the price of a basket of goods the same in each country.

巨无霸指数是建立在购买力平价理论的基础上。 购买力平价理论认为，汇率应该使得一揽子商品的价格在各个国家都相同。

It is based on the theory of purchasing-power parity (PPP), which says that exchange rates should equalise the price of a basket of goods in each country.

它是基于购买力平价理论，也就是说汇率应该使不同国家的一篮子商品的价格达到均衡。

It is based on the theory of purchasing-power parity (PPP), which says that exchange rates should equalise the price of a basket of goods in any two countries.

其基础是购买力平价理论，该理论认为，汇率应保持一篮子消费品在任何两个国家里价格相同。