用英文解释一下GDP的定义吧...2,3句就够了...

GDP
gross domestic product
The total value of the production of goods and services in a nation measured over a year. (This includes production by non-nationals; compare with GNP.) This is an unduplicated measurement, that is to say, if vinyl, for example, is used to press a record, the value of that vinyl is not registered in addition to the value of the record itself.

GDP是英文“Gross Domestic Product”的简称，其中“Domestic”具有“国内、地区、当地、家里”等含义。
国内生产总值

A region's gross domestic product,or GDP,is one of the ways for measuring the size of its economy.The GDP of a country is defined as the market value of all final goods and services produced within a country in a given period of time.It is also considered the sum of value added at every stage of production of all final goods and services produced within a country in a given period of time.Until the 1980s the term GNP or gross national product was used in the United States.The two terms GDP and GNP are almost identical - and yet entirely different; GDP being concerned with the region in which income is generated and GNP (or GNI - Gross National Income) being a measure of the accrual of income to a region.The most common approach to measuring and understanding GDP is the expenditure method:
GDP = consumption + investment + (government spending) + (exports − imports)

Gross Domestic Product
国内生产总值