And he produced a fluid from cowpox lesions, so these were these lesions, these skin lesions on cows.

他生产出一种取自牛痘,即牛皮肤上的瘢痕的液体

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