Ключевые слова: android, app, application, background, black, business, cellphone, cement, ceramic, close up, closeup, concrete, copy space, dark, device, digital, display, duolingo, education, flat lay, foreign language, grey, icon, illustrative, information, language, launch, learning, log in, login, logo, marble, mobile, nobody, object, office, online, phone, screen, search, sign, smart phone, smartphone, splash screen, stone, symbol, technology, top view, touch screen, workspace,