Ключевые слова: attack, beat, business, cardiogram, cardiology, cell, computer, consulting, cross, diary, double, ecg, exposure, frequency, hand, heart, heartbeat, icon, innovation, insurance, internet, knowledge, learn, life, medicine, modern, notepad, notes, online, page, pattern, pen, poly, pulse, rate, remark, simple, sunlight, surgery, symbol, technology, text, texture, training, treatment, wave, web, white, workplace, writes,