英文關鍵字
academic
adult
book
books
bookshelf
campus
casual
caucasian
cheerful
college
concentration
couple
desk
education
exam
female
friends
group
handsome
happy
homework
indoors
knowledge
laptop
learning
library
literature
looking
male
man
people
person
portrait
read
reading
research
school
sitting
smiling
student
students
study
studying
table
teamwork
textbook
together
university
woman
young