And that person who really studied it systematically, and is given credit for developing the first vaccine, is a Scottish physician named Edward Jenner.

而那个系统研究疫苗,并被誉为发明了第一支疫苗的人,叫爱德华?詹纳,是苏格兰的一名医生

耶鲁公开课 - 生物医学工程探索课程节选

And this is the first descriptive step to developing a theory of laughter.

这是第一个描述性的步骤,来建立笑的理论。

耶鲁公开课 - 心理学导论课程节选