If you're trying to prevent a disease that only occurs at a rate of 20 per 100,000 people you have to give the vaccine to millions in order to see if the number goes down.

如果你尝试去防治一个,发病概率为十万分之二十人的疾病,那么就必须将疫苗分发给数百万人,以观察疫苗能否降低发病率

耶鲁公开课 - 生物医学工程探索课程节选

If we look forward to the end of the term when we read The Human Stain, which is about a man, Coleman Silk, who tries to and succeeds in passing as Jewish.

展望一下期末，那时我们会读到《人性的污点》,写一个叫Coleman，Silk的人他尝试，并成功地以犹太人身份在社会生活。

耶鲁公开课 - 1945年后的美国小说课程节选