"And this is why we are asking the United States to ensure that material assistance and training that is given to security forces in Somalia are accompanied by vetting of personnel and the creation of specific mechanisms to respond to serious abuses when they occur,"

VOA: standard.2009.07.31

The World Health Organization keeps track of what countries have cases of polio and when they occur, and what the frequency of--So, this is a map from a few years ago and there are efforts that occur occasionally.

世界卫生组织一直跟踪记录,发生小儿麻痹症的国家及发病时间,以及发生的频率,那么,这是从几年前开始统计的,一个地图,这里是一些偶然产生的成就

耶鲁公开课 - 生物医学工程探索课程节选