Pope Formosus died after a pontificate of four and a half years.是什么意思？

Pope Formosus died after a pontificate of four and a half years.

教皇福尔摩苏斯上任四年半后去世。

pope

n. 罗马教皇，主教，权威，大师；

例句
The Pope has sent a message appealing for unity in his homeland, against a background of divisions in the Solidarity movement...
团结运动中各派搞分裂，在此情况下教皇发出号召，呼吁祖国保持团结。

Formosus

n. 罗马教皇，主教，权威，大师；

例句
Pope Formosus died after a pontificate of four and a half years.
教皇福尔摩苏斯上任四年半后去世。

died

v. 死亡，枯萎（ die的过去式和过去分词 ），死时处于（某种状态）或具有（某种身份）；adj. 死亡的，消逝的；

例句
Both of them died in abject poverty...
他们两人都于穷困潦倒中死去。

after

prep. …后的，（表示时间）在…以后，（表示位置、顺序）在…后面；conj. 在…以后；adv. 以后，继后；adj. 后来的，以后的；

例句
Her lover walked out on her after she had aborted their child.
她的情人在她打掉胎儿后甩了她。

pontificate

n. 教皇的职位，主教的地位；vi. 装作教皇的说话；

例句
Politicians like to pontificate about falling standards.
政客喜欢自以为是地谈论准则的废弛。

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

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。

and

conj. 和，与，而且，于是，然后，因此；

例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

half

adj. 一半的，半个的；n. 半，一半，（啤酒等饮料的）半品脱，（比赛、音乐会等的）半场；adv. 一半，部份地；

例句
Too often he only absorbs half the information in the manual...
他对于说明书上所说的经常是一知半解。

years

n. 年( year的名词复数 )，年纪，一年的期间，某年级的学生；

例句
His wife was sentenced to seven years imprisonment for aiding and abetting him...
他的妻子作为他的从犯被判入狱7年。