Ключевые слова: 20s, book, casual, caucasian, closeup, college student, comfortable, computer, concepts, education, exam, expertise, grass, high school student, internet, laptop, learning, lifestyle, male, men, one person, outdoors, part of, preparation, relaxation, research, sitting, student, studying, success, surfing the net, technology, teenager, typing, university, unrecognizable person, wireless technology, working, young adult,