I want to shift now and talk about where does all this knowledge come from but I'll stop and answer any questions about the material so far.

现在我想来换下一个话题,说说这些知识都是从哪学到的,不过我要先停下来回答你们,关于目前内容的问题

耶鲁公开课 - 心理学导论课程节选