美国科学家成功地将猪肾移植到人体上

transplant — v. to perform a medical operation in which an organ or other part that has been removed from the body of one person is put into the body of another person

urine — n. waste liquid that collects in the bladder before leaving the body

transfusion — n. a medical treatment in which someone's blood is put into the body of another person

valve — n. a mechanical device that controls the flow of liquid, gas, etc., by opening and closing

skin graft — n. a piece of skin that is attached to a part of the body to repair a damaged area

cornea — n. the clear outer covering of the eyeball