To be a building, half of a structure's height must have usable floor space.

VOA: special.2010.03.31

Let the height of the building be h.

设楼的高度为 h

耶鲁公开课 - 基础物理课程节选

Let the height of the building be h.

设楼的高度为 h

耶鲁公开课 - 基础物理课程节选