The president extemporized a speech after the working dinner.是什么意思？

The president extemporized a speech after the working dinner.

总裁即席发表了一篇工作餐后演说.

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

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

president

n. 校长，总统，总裁，董事长；

例句
The President described the killings as an abominable crime...
总统称这些血案为令人发指的罪行。

extemporized

v. 即兴创作，即席演奏( extemporize的过去式和过去分词 )；

例句
He completely departed from the text and extemporized in a very energetic fashion.
他完全脱稿，慷慨激昂地进行即席演说。

speech

n. 演说，演讲，发言，说话，谈话，说话能力或方式，（乐器的）音，音色，方言，民族语言；

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。

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。

working

adj. （涉及）工作的，（人）有工作的，（时间）用于工作上的，（想法等）可作为基础的；v. （使）工作( work的现在分词)，（使）运作，运转，（使）产生效果；n. 工作，活动，制作，操纵；

例句
The workforce have recently been calling for their working hours to be reduced. Many companies have accordingly switched to a five-day week.
工人们最近一直在呼吁缩短工作时间。许多公司于是转成了一周五天工作制。

dinner

n. 正餐，主餐，宴会，晚餐；

例句
At the dinner table, my father would go on and on, showing off, aggrandising himself...
我父亲在餐桌上总是滔滔不绝地炫耀并吹嘘自己。