N-COUNT
地下室；地下层
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...
他们买了一处老校舍当住房，然后在地下室里建了一个作坊。
They live in a basement flat in North London.
他们住在伦敦北部的一所地下公寓里。