英文關鍵字
activity
adult
assignment
book
boy
brother
caucasian
child
classroom
concept
desk
education
elementary
flip
friend
happy
homework
kid
knowledge
learn
lesson
lifestyle
little
looking
notebook
page
pen
pencil
people
pupil
recreation
school
schoolboy
schoolkid
sitting
sleep
sofa
stress
student
studying
table
tablet
think
touchscreen
white
writing
youth