Poverty had declined during his presidency.是什么意思？

Poverty had declined during his presidency.

在他担任总统期间，贫困人口减少了。

poverty

n. 贫穷，缺乏，不足，贫瘠，不毛，低劣；

例句
The poverty figures were undoubtedly an embarrassment to the president.
贫困数字毫无疑问让总统非常难堪。

had

v. 有（ have的过去式和过去分词 ），（亲属关系中）接受，拿，买到；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

declined

v. 辞谢，谢绝（邀请等）( decline的过去式和过去分词 )，（道路、物体等）下倾，（太阳）落下，（在品格、价值上）降低；

例句
The President declined to deliver the speech himself, on account of a sore throat...
总统因嗓子不适而婉拒了亲自讲话。

during

prep. 在…的时候，在…期间，当…之时，其间；

例句
...the accrual of funds used during construction.
建设过程中资金的累积

his

pron. (he的所有格)他的，(he的物主代词)他的东西；det. 属于他的，用于名词前，自己的，指某人的，上帝的；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

presidency

n. 总统，总统的任期，管辖，支配；

例句
Any aspirant to the presidency here must be seriously rich...
要想当这儿的主席一定要家财万贯。