"These ideas are probably better seen in some European communities where they have a long tradition of trying to preserve their historical development identity and had,in the past, much more orientation to walking and the use of transit.

VOA: standard.2010.07.26

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