The company became a revolving-door workplace.是什么意思？

The company became a revolving-door workplace.

这家公司成了工作的中转站。

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。

company

n. 公司，商号，作伴，伴侣，客人，连队，中队，（社交）集会，聚会；

例句
The company say they're able to keep pricing competitive...
该公司说他们能够使定价保持竞争力。

became

v. 变为，成为（ become的过去式 ）；

例句
It became very clear that the incident was not just an aberration, it was not just a single incident.
事实已经很清楚，这件事不是偶发的，它并不是一起孤立的事件。

workplace

n. 工作场所，车间，工厂；

例句
Don't allow a minor irritation in the workplace to mar your ambitions...
不要让工作中的一点烦心事打击了你的雄心抱负。