Their rancor dated from a political dogfight between them.是什么意思？

Their rancor dated from a political dogfight between them.

他们的积怨来自于他们之间在政治上的狗咬狗.

their

pron. 他（她，它）们的，在提及性别不详的人时，用以代替 him 或 her；

例句
Their permissiveness toward their children reflects the wild abandon of their own lives.
他们对孩子的放任折射出他们自身生活的放浪形骸。

rancor

n. 深仇，积怨，怨恨；

例句
Their rancor dated from a political dogfight between them.
他们的积怨来自于他们之间在政治上的狗咬狗.

dated

adj. 有日期的，陈旧的；v. 过时( date的过去式和过去分词 )，使…显老，显示出…时代（或年龄），鉴定…的年代；

例句
The letter is dated 2 July 1993.
信件上的日期是 1993 年 7 月 2 日。

from

prep. （表示时间）从…，（表示原因）因为，（表示来源）来自…，（表示分离）与…分离[隔开]；

例句
...an abortive attempt to prevent the current President from taking office.
企图阻止现任总统连任的失败尝试

political

adj. 政治的，政党的，对政治有兴趣的；

例句
He has also called for an acceleration of political reforms.
他同时呼吁加快政治改革的步伐。

dogfight

n. 混战，空战，狗咬狗，缠斗；vi. 在空中缠斗；

例句
A few men were watching a dogfight on a small TV.
几个人正在看小电视上的狗打架节目.

between

prep. 在…之间，私下，暗中，在…中任择其一，来往于…之间；adv. 当中，中间；

例句
How big is the abyss between what you think you are and what you actually are?
你对自己的认识和真实的你之间差别到底有多大？

them

pron. 他们，她们，它们；

例句
I take care of them to the best of my abilities...
我尽我所能地照顾他们。