英文關鍵字
academic
adult
background
book
bookcase
books
bookshelf
bookstore
boy
campus
casual
caucasian
college
concentrated
education
exam
handsome
homework
indoors
information
interior
knowledge
learn
learning
library
lifestyle
literature
looking
male
man
people
person
portrait
read
reading
research
school
serious
shelf
sitting
smiling
standing
student
students
study
studying
textbook
university
white
young