Ключевые слова: 20s, adult, assistance, assisting, book, bookshelf, boy, casual, caucasian, childhood, children, choice, choosing, education, female, girl, holding, horizontal, indoor, innocence, kneeling, knowledge, learning, leisure, librarian, library, lifestyle, looking, people, person, preschool, primary, reading, school, schoolboy, schoolgirl, selecting, standing, studying, teacher, three, woman, women, young,