英文關鍵字
adult
backpack
book
casual
caucasian
college
concentration
education
enjoy
enjoyment
exam
expression
green
guy
handsome
highschool
holiday
homework
intelligence
knowledge
landscape
learn
learning
leisure
life
lifestyle
male
man
nature
outdoor
outdoors
page
park
pencil
people
read
reading
school
side
sitting
student
study
studying
tablet
test
university
view
writing
years
young