Ключевые слова: 20s, adult, adults, attractive, authentic, beautiful, book, books, candid, casual, caucasian, class, classroom, college, copyspace, cropped, education, female, happiness, happy, holding, indoors, informal, inside, learning, lecture, lecture hall, life, lifestyle, looking, natural, one, people, person, real, scholar, school, smile, smiling, standing, student, students, study, teacher, university, woman, work, working, young, youth,