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

VOA: special.2010.03.31

One of these classrooms in this building in another classrooms again is flat classrooms with thirteen tables and a lot of nice space between them.

这栋楼里的一间教室,是另外一种教室,有13张桌子的扁平型教室,之间还有足够的空间。

麻省理工公开课 - 媒体、教育、市场课程节选

It covers more space with less material than any other building ever designed.

VOA: special.2010.05.30

"We are not backing away. We are going full steam ahead with our programs in Iran and across the region,again in order to create that space for civil societies to actually play the proper role that we would all understand in building more accountable democratic governing institutions,".

VOA: standard.2009.10.28