do you listen to that? We are sick because we are ill.

听到吗？我们病了是因为我们在生病。

哈佛公开课 - 幸福课课程节选

You could have good humours and you could have bad humours and if those humours, whatever they are, got out of balance then you got sick if you had too many bad ones compared to good ones.

你可以有正常的体液,也可以有异常的体液,如果这些体液,不管体液究竟为何物,当体液失衡,你就会生病,即在异常体液比正常体液多时就会生病

耶鲁公开课 - 生物医学工程探索课程节选

Now, the problem, or one of the challenges with clinical trials of vaccines is that you have to enroll a lot of patients into clinical trials because only a few are going to get sick in any case, only 20 out of 100,000.

现在的问题是,这也是疫苗临床试验的挑战之一,临床试验必须包括足够多的病人,毕竟只有一小部分人会被传染,十万人里面只有二十人被传染

耶鲁公开课 - 生物医学工程探索课程节选