N-COUNT
地下室；地下層
The basement of a building is a floor built partly or completely below ground level.
例句
They bought an old schoolhouse to live in and built a workshop in the basement...
他們買了一處老校舍當住房，然后在地下室里建了一個作坊。
They live in a basement flat in North London.
他們住在倫敦北部的一所地下公寓里。