活板门, 暗门
a hinged or removable panel in a floor, ceiling, or roof, allowing access to a space below or above
:
• He lifted the trapdoor and descended into the cellar.
他掀开活板门，下到地窖。
• The stage had a hidden trapdoor for special effects.
舞台上有一个隐藏的活板门，用于特殊效果。
