英文關鍵字
abstract
academic
adult
beautiful
beauty
book
boys
cheerful
college
during
education
female
girl
green
happiness
happy
helping
hispanic
holding
joy
large
laughing
lawn
leaning
leisure
lifestyle
looking
male
math
nature
notes
one
outdoor
park
people
person
portrait
pretty
read
rest
school
smiling
speaking
stadium
strolling
student
study
studying
teen
test
textbook
textbooks
through
university
woman
young