英文關鍵字
1080p
academic
asleep
black
blackboard
boy
caucasian
chalkboard
child
childhood
class
classmates
classroom
cute
definition
development
early
education
elementary
female
four
girl
hd
high
highdef
knowledge
learn
learning
lesson
male
mixedrace
napping
people
preschool
pupil
resting
school
schoolchild
sleeping
slumber
studying
ultra