"That led to this extraordinary opportunity to study, not just any animal,but chimpanzees.

VOA: special.2009.11.18

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

And,it provides examples of how to search for and study this animal.

VOA: special.2009.07.07

The study used an animal form of H.I.V.

VOA: special.2009.03.16