revolving door

US /rɪˈvɑːl.vɪŋ dɔːr/
UK /rɪˈvɑːl.vɪŋ dɔːr/
"revolving door" picture
1.

porta girevole

a type of door that consists of three or four panels that hang from a central shaft and rotate around a vertical axis within a cylindrical enclosure, allowing people to enter and exit a building while minimizing drafts and heat loss

:
The hotel entrance had a large glass revolving door.
L'ingresso dell'hotel aveva una grande porta girevole in vetro.
Be careful when using the revolving door, it can be tricky.
Fai attenzione quando usi la porta girevole, può essere complicato.
2.

porta girevole (fig.), ricambio continuo

a situation in which people frequently leave and return to an organization or position, often implying a lack of stability or a cycle of movement

:
The company has a revolving door of employees, making it hard to build a stable team.
L'azienda ha una porta girevole di dipendenti, rendendo difficile costruire un team stabile.
The political system often seems like a revolving door for lobbyists and former officials.
Il sistema politico spesso sembra una porta girevole per lobbisti ed ex funzionari.