One of the big problems with studying human diseases is that you can study how they occur in people but there's only a limited amount that you can learn from people.

在人类疾病研究中的一个难题是,你有能力研究发病原因,但以人类为样本做研究却是备受限制

耶鲁公开课 - 生物医学工程探索课程节选