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。

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.

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人民币汇率不存在持续贬值的基础，将在合理均衡的水平上保持基本稳定。

There is no basis for continued depreciation of the RMB exchange rate. It will stay basically stable on an adaptable and equilibrium level.

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