Because the cells are the fundamental component of our bodies; very interesting because all of our cells in our body share many characteristics and some of those characteristics are shown on this picture.

因为细胞是我们身体的基本构成单位,这非常有意思,因为我们身体里所有细胞,有许多共同的特征,而其中的一些特征展示在了这幅图中

耶鲁公开课 - 生物医学工程探索课程节选

And that was possible in smallpox because of a few characteristics of the disease: one is that it's a--it's purely a human disease, humans are the only organisms that are affected by it.

天花能够被根治的原因在于,这种疾病具有以下几个特点,一是,它是一种只有人类才得的疾病,人类是唯一受天花感染的生物

耶鲁公开课 - 生物医学工程探索课程节选

So, you have these diets and you have these parliaments, but one of the characteristics of absolute rule is that you don't have to call these bodies because the king is the big person.

所以,虽然设有国会,议会,绝对主义国家的特点之一,就是君主不必召开这些代议机构,因为他一人说了算

耶鲁公开课 - 欧洲文明课程节选