[多项选择]美国的经济体制主要是围绕着私人企业和以市场为导向而建立起来的，在这种经济中，消费者们在很大程度上通过他们在市场上花钱购买他们最需要的货物和设施来决定厂家该生产什么。

参考答案:The economic system of U. S. A. is mainly set up centering on the private enterprises and market orientation. In such kind of economic system, consumers can to a large extent determine what, the manufacturers should produce by the purchase of the goods and facilities they need most in the market.