英文關鍵字
child
home
writing
math
closeup
hands
unrecognizable
pen
solving
education
paper
boy
pupil
homework
studying
learning
slow
motion
desk
table
book
person
one
schoolboy
school
indoor
young
student
sitting
notebook
kid
room
caucasian
knowledge
apartment
teenager
teaching
working
schoolchild
paperwork
lesson
mathematics
back
view
doing
texting
schoolkid
distance
exercise
online
tracking
shot