fall through the floor；
hold the floor；
sink through the floor；
take the floor
His work was spread all over the floor.
他工作的\'材料摊了一地。
There is a fire exit on each floor of the building.
这栋建筑每层楼都有个消防通道。
The alterations should give us extra floor space.
这些改动应该使我们有更大的居住面积。
