They evolve to become very dense, hard, pustular lesions, which are filled with what turns out to be tissue debris.

它们逐渐变成粘稠,发硬,产生脓包状的伤痕,而这些粘稠的脓事实上是组织残骸

耶鲁公开课 - 生物医学工程探索课程节选

He took this pustular fluid that was produced at this very specific phase of the disease, and he developed a way for giving that to people.

他取出脓包中的,由这种,非常特殊的过程产生的液体,他还发明了一种将之接种到人身上的方法

耶鲁公开课 - 生物医学工程探索课程节选

And it would,you'd get a clear blister-like region, it would turn pustular.

你会看到一个透明的像水泡一样的地方,它会变成脓疱

耶鲁公开课 - 生物医学工程探索课程节选