一、Courtesy 礼貌语言要有礼且谦虚,及时地回信也是礼貌的表现。例如:We have received with many thanks your letter of 20 May, and we take the pleasure of sending you our latest catalog. We wish to draw your attention to a special o
贸易差额(Balance of Trade)是一国在一定时期内(如一年、半年、一季、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,称为"贸易平衡"。当出口总值大于进口总值时,出现贸易盈余,称"贸易顺差"或"出超"。当进口总值大于出口总值时,出现贸易赤字,称"贸易逆差"或"入超"。通常,贸易顺差以正数表示,...