英文關鍵字
adolescence
adult
arms
attractive
book
closeup
college
concentrated
concentration
concept
desk
doing
education
exam
female
finger
focus
girl
homework
human
information
knowledge
learning
lecture
library
only
page
pen
pencil
people
person
pile
pretty
reading
school
schooling
sitting
smart
student
study
studying
table
teaching
teenage
teenagers
textbook
write
writing
young