Definition: a level of a building Level: B2
这是一栋三层楼的房子。
It's a three-___story house.
她住在一栋七层楼的建筑里。
She lived in a seven-___story building.
这栋建筑是单层结构，采用俄罗斯风格。
The building is a one-___story structure in Russian style.
