VOA慢速英语:我们应该感谢奶牛的“疫苗”

devastating – adj. causing great damage or harm

scar – n. a mark remaining (as on the skin) after injured tissue has healed

sore – n. a sore or painful spot on the body usually with the skin broken or bruised and often with infection

expose – v. to cause (someone) to experience something or to be influenced or affected by something

pus – n. a thick, yellowish substance that is produced when a part of the body or a wound becomes infected

immunity – n. the power to keep yourself from being affected by a disease