(n.) A lifting or sliding door covering an opening in a roof
or floor.
(n.) A door in a level for regulating the ventilating current;
-- called also weather door.
乔校对
双语例句
I do think _The Witches Curse, an Operatic Tragedy_ is rather a nice thing, but I'd like to try _Macbeth_, if we only had a trapdoor for Banquo. 路易莎·梅·奥尔科特.小妇人.