U.N.children's agency in Somalia Deputy Representative Hannan Suleiman tells VOA that unlike countries like Yemen that may run out of water entirely in the next two decades, Somalia is thought to have plenty of water underground to sustain people for many generations.

VOA: standard.2009.10.06

So within a couple of generations people could move up from being the lowest slaves to two generations of being free Roman citizens.

所以几代以内,奴隶能从最低社会等级,上升两位，成为自由的罗马公民。

耶鲁公开课 - 新约课程节选