活板門, 暗門
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.
他掀開活板門，下到地窖。
• The stage had a hidden trapdoor for special effects.
舞台上有一個隱藏的活板門，用於特殊效果。
