VOA慢速英语:Young Cameroon Engineer Invents Cardiopad

appeal – n. a serious request for help or support

cardiac – adj. of or relating to the heart (For example: She went into cardiac arrest, meaning, her heart stopped beating.)

investors – n. people who use their money to buy a product or stock in a company in order to make a future profit

specialists – n. doctors who deal with health problems that relate to a specific area of medicine