英文英文字典
英文英文字典
古腾堡计划中的在线英语-英语词典
结果
Trapdoor的结果
Trapdoor
(n.)
A lifting or sliding door covering an opening in a roof
or floor.
Trapdoor
(n.)
A door in a level for regulating the ventilating current;
-- called also weather door.