If animals get a similar disease then you can learn about that disease progression in much more detail in the animal.

如果动物也能罹患相似的疾病,那么我们可以通过动物,更详尽的研究病程发展

耶鲁公开课 - 生物医学工程探索课程节选

But, unfortunately, there aren't good animal models for many of the diseases that we'd like to study.

但是很遗憾的是,对于很多我们想要研究的疾病,并不能找到合适的动物模型

耶鲁公开课 - 生物医学工程探索课程节选