lift the lid on
US /lɪft ðə lɪd ɑn/
UK /lɪft ðə lɪd ɑn/

1.
揭露, 揭开盖子, 曝光
to reveal something secret or previously hidden, often something scandalous or unpleasant
:
•
The investigation aims to lift the lid on corruption within the department.
这项调查旨在揭露部门内部的腐败。
•
A new documentary will lift the lid on the dark side of the fashion industry.
一部新纪录片将揭露时尚界的阴暗面。