The economic system of the United States is composed of the products bought and sold constantly as well as all services, including transportation and education services.

• 美国的经济体系由各种各样的产品购成,这些产品就是不断的被买与被卖的产品;这个复杂的价格系统还由各种各样的服务构成,这些服务包括交通服务和教育服务。