Ключевые слова: background, biracial, blue, blue background, book, college, copy, copy space, desk, document, education, hand, holding, knowledge, laptop, learn, learning, leisure, leisure time, library, literature, male, man, mid adult, multiracial, note, notebook, one person, page, pen, pencil, people, read, reading, school, space, student, study, studying, textbook, time, university, writing,