Ключевые слова: background, book, cardiologist, care, certificate, class, college, composition, computer, copy, device, diagnose, doctor, education, emergency, equipment, flat, health, hospital, instrument, lay, learning, library, literature, medic, medical, medicine, modern, nobody, nurse, object, physician, profession, research, school, scientific, space, specialist, stethoscopes, student, students, study, stuff, success, table, tablet, technologies, text, top, view,