求翻译：一国在一定时期内（如一年、半年、一季或一月）出口总值与进口总值之间的差额，当出口总值与进口总值相等时，称贸易平衡，当出口总值大于进口总值时，为贸易顺差或出超，当进口总值大于出口总值时，为贸易逆差或入超。是什么意思？

A country in a given period (eg one year, half, quarter, or January), total export value and the difference between the total value of imports, while exports and total imports are equal, said the trade balance, when the export value is greater than when the total value of imports, the trade surplus

A State within a certain period, half a year (for example, a quarter, or a total value of exports and imports), the difference between the total value of exports and imports, and equal, known as trade balance, the total value of exports, imports, and greater than the trade balance or surplus, the to

A country in certain time (for example year, half year, Ji Huo in January) between gross export and gross import difference, when gross export and gross import equal, calls the balance of trade, when the gross export is bigger than the gross import, is the trade surplus or the favorable balance of t

A State within a certain period (such as a year, half year, quarter, or January) difference between the value of total exports and imports, when the value of total exports and imports are equal, the trade balance, when you export value is greater than the total value of imports, trade surplus or sur

Difference between total import value and the total export value during a specified period of time (such as one year, half a year, one quarter or January) between a country, when equal to total import value in total export value, call the trade balance, when greater than the total import value in to