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
Wellhole的结果
Wellhole
(n.)
The open space in a floor, to accommodate a staircase.
Wellhole
(n.)
The open space left beyond the ends of the steps of a
staircase.
Wellhole
(n.)
A cavity which receives a counterbalancing weight in
certain mechanical contrivances, and is adapted also for other
purposes.