英文關鍵字
1080p
academic
blackboard
boy
career
caucasian
chalkboard
child
childhood
class
classmates
classroom
cute
definition
development
early
education
elementary
hd
high
highdef
job
knowledge
learn
learning
lesson
male
occupation
of
part
people
preschool
profession
pupil
school
schoolchild
studying
teacher
teaching
two
ultra
woman