Harvard won by four lengths.是什么意思？

Harvard won by four lengths.

哈佛大学队领先4个艇位胜出。

Harvard

美国哈佛大学；

例句
He was a professor of criminal law at Harvard University law school...
他是哈佛大学法学院的刑法学教授。

won

v. 获胜，战胜（ win的过去式和过去分词 ）；

例句
His abrasive manner has won him an unenviable notoriety...
他生硬粗暴的态度让他声名狼藉。

by

prep. 在…旁边，表示方式，由于，经过；adv. 经过，表示保留或保存时用，短暂拜访；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

four

num. 四，四个，第四；n. 四个人（或事物）的一组，得四分的一击，四人赛艇；

例句
His car was held up and he was abducted by four gunmen...
他的车遭遇拦劫，随后他被4名持枪歹徒劫持。

lengths

n. 长( length的名词复数 )，（持续）时间的长短，一段，（马或船的）自身长度；

例句
The government's going to great lengths to demonstrate its military might.
该政府正不遗余力地展示其军事力量。