Doug and Tina Suhr have more than one hundred milking cows on their family farm.

VOA: special.2009.05.12

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

No, I'm still working on cows but we're not giving them away.

没,我还在研究那个奶牛的问题,但是我们现在不送奶牛了

耶鲁公开课 - 金融市场课程节选

Cows were kept on the first floor and the one above was used to store hay.

VOA: special.2009.12.29