这个部门在过去六个月里经历了一场旋转门，已经有五位经理离职了。

The department has seen a ___revolving-door of managers, with five leaving in the past six months.

商场入口处的旋转门可以防止冷空气直接进入室内。

The ___revolving-door at the mall entrance prevents cold air from rushing inside.

公司高管频繁更替造成了管理层的不稳定。

The company's ___revolving-door leadership has created instability in management.