Ключевые слова: adult, app, application, background, black, blank, cellphone, classmates, classroom, closeup, coworking, diverse, education, emotional, empty, entertainment, female, friends, gadget, group, happiness, happy, holding, indoors, learning, lifestyle, millennial, mobile, mockup, modern, network, one, online, outside, panorama, phone, reading, screen, selective focus, smartphone, smiling, student, students, studying, technology, template, wireless, woman, young,