Ключевые слова: 18, 20s, biology, book, botany, caucasian, cheerful, chemical, classmates, classroom, collage, college, course, doing, education, female, friend, friendship, happy, homework, knowledge, lab, lab coat, laboratory, learning, lecture, male, man, mixedrace, montage, notebook, research, safety glasses, smiling, students, studying, university, woman, working, writing, young adult,