摘要
All of us are being affected by the huge differences in the world＇s two largest economies population sizes and growth rates. The population of China is four times larger than America＇s. From 1993 to 2012, America＇s annual gross domestic product grew from US$5.6 tril- lion to US$15.6 trillion as China＇s jumped from U55666 billion to US$8.3 trillion a year, according to the World Bank.
