...the four companies constituting the Aramco partnership.是什么意思？

...the four companies constituting the Aramco partnership.

组成阿美合伙公司的4家公司

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。

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。

companies

n. 公司( company的名词复数 )，[军事]连，连队，客人；

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。

constituting

v. 建立( constitute的现在分词 )，指定，（合法或正式地）成立，构成；

例句
...the four companies constituting the Aramco partnership.
组成阿美合伙公司的4家公司

Aramco

abbr. Arabian-American Oil Company 阿拉伯-美国石油公司；

例句
...the four companies constituting the Aramco partnership.
组成阿美合伙公司的4家公司

partnership

n. 伙伴关系，合伙人身份，合作关系，合营公司；

例句
This partnership has a good chance of success...
这个组合获胜的希望很大。