After three and a half years of fighting, hundreds of thousands of Union and Confederate soldiers had been killed or wounded.

VOA: special.2009.12.03

One of the big arguments that is part of this story is when did this development of new way of fighting come about; rather quickly, over a matter of a few years, or did it stretch out over quite a long time.

人们对此最大的争议就在于,这种新型战斗方式是何时为军队所用的,是在短短几年内迅速发展起来的呢,还是在很长的一段时间逐步形成的呢

耶鲁公开课 - 古希腊历史简介课程节选

General Robert E.Lee surrendered in early April, bringing an end to four years of fighting.

VOA: special.2010.01.14

Another new member of the Hall of Fame has been fighting to help victims of abuse for more than thirty years.

VOA: special.2009.03.13

Four years of bloody fighting had saved the Union of states.

VOA: special.2010.01.14

The country is just seven years removed from 27 years of civil war during which the United States backed rebels fighting President Dos Santos.

VOA: standard.2009.08.10

Hollywood actress,Mia Farrow, who has been fighting for the rights of children for years.

VOA: standard.2009.10.08