Ключевые слова: background, book, cardiologist, cardiology, care, certificate, class, college, concept, copy, cure, degree, diagnose, diagnostic, disease, doctor, education, equipment, expert, flat, future, health, hospital, lay, learn, library, life, literature, medic, medical, medicine, nurse, object, open, physician, profession, professional, research, school, scientific, space, stethoscope, student, study, text, textbook, top, university, view, white,