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

VOA: special.2010.03.31

First, take the case in the elevator is on the ground floor of some building and completely addressed.

首先我们来看看电梯,在一楼时候的情况

耶鲁公开课 - 基础物理课程节选

You can do that on email, you can do that in my office, which is downstairs on the first floor of this building, in LC-109.

发邮件，来办公室找我，我的办公室在这栋楼的1层，LC109室。

耶鲁公开课 - 现代诗歌课程节选

The Council explains on its Web site that early tall buildings were generally measured from the ground floor to the top of the building, not including flagpoles.

VOA: special.2010.03.31

In one study they looked at a housing project in Manhattan and they asked people where their best friend was and 90% of them said, "My best friend is in the same building as me," and 50% of them says the same floor.

在一个针对一栋曼哈顿住宅的研究中,他们问住户他们最好的朋友住在哪,90%的人说，“我最好的朋友和我住同一栋楼”,50%说住在同一层楼。

耶鲁公开课 - 心理学导论课程节选

It's an enchanting dreamland on the top floor of an old theater building.

VOA: standard.2010.02.25

The medals for the Olympics and Paralympics are on display on the second floor of the building, where Project Manager Dan Mallett tells tour groups about how the medals were designed and made.

VOA: standard.2010.02.16