The development community is divided over whether non-profits should give away or sell technology and services as diverse as solar lighting, water filtration,healthcare and education.

VOA: standard.2010.08.09

And we're going to do that by talking about some examples, some historical examples, in the sort of technology and vaccine development.

我们将通过讨论一些例子来讲解这个主题,一些历史上的例子,关于科技和疫苗发展的例子

耶鲁公开课 - 生物医学工程探索课程节选