美国经济2009年第四季度实现六年来最大增幅。美国商务部星期五报告说，第四季度美国国内生产总值按年率增长5.7%，增幅是上一季度的两倍以上，超出大部分专家的预期。
国内生产总值衡量一个国家生产的所有产品和服务的总值，是衡量经济健康状况的最广泛的标准。
The U.S. economy grew at the fastest pace in six years in the last few months of 2009.
Friday's report from the Commerce Department says the U.S. gross domestic product expanded at a 5.7 percent annual rate in the fourth quarter.That is more than double the growth rate in the previous quarter, and faster than most experts had predicted.
The GDP measures all the goods and services produced in a nation and is the broadest gauge of the economy's health.
