英文關鍵字
adult
african
afroamerican
american
background
black
book
books
casual
close
closeup
college
education
exam
expression
eyeglasses
face
glasses
guy
homework
knowledge
learn
learning
library
lifestyle
literature
male
man
motivation
one
person
read
reading
school
science
shock
shocked
student
study
studying
surprise
surprised
textbook
university
up
using
work
yellow
young