One is that you got to get the vaccine from cows, so you got to have an infected cow in order to produce the vaccine.

一是,你若要想从奶牛身上得到疫苗,那就得有一头奶牛感染病毒

耶鲁公开课 - 生物医学工程探索课程节选

I forget who--it may have been Charles Seller who said if you want to see the Market Revolution happening go study the Archives of the U.S. Patent Office.

我忘了是谁说的,大概是查尔斯.塞勒,他说,若你想看看市场革命是怎么发生的,就去研究美国专利局的档案吧

耶鲁公开课 - 美国内战与重建课程节选