VOA慢速英语:New Technology Helps Move Hearts(翻译)

disparity – adj. different from each other

preserve – v. to keep something its original state and good condition

recipient – n. a person who receives something

graduate – v. to earn a degree from a high school or college

bile – n. a yellow or green liquid made by the liver that helps the body digest fats

according to – adv. as stated, reported or recorded by

functioning – adj. working to operating