按总GDP衡量，中国将在二十年内取代美国，尽管准确的时间点预测取决于你对两个经济体的增长率以及人民币换算成美元的汇率的假设。
China is poised to overtake the United States in terms of aggregate GDP within two decades, although forecasting precisely when depends on what one assumes about the growth rates of the two economies and the exchange rate used to convert renminbi into dollars.