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。
THE Big Mac index is based on the theory of purchasing-power parity (PPP)—exchange rates should equalise the price of a basket of goods in different countries.
巨无霸指数基于购买力平价理论，该理论认为汇率应该使不同国家的一揽子商品的价格相等。
The Big Mac index is based on the theory of purchasing-power parity (PPP), according to which exchange rates should adjust to equalise the price of a basket of goods and services around the world.
巨无霸指数以购买力平价理论为基础。根据该理论，汇率需调整以均衡全球范围内的一篮子食物和服务的价格。
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