英文關鍵字
1080p
academic
book
boy
caucasian
chalkboard
cheerful
child
childhood
class
classroom
cute
definition
desk
development
drawing
early
education
elementary
happy
hd
high
highdef
knowledge
learn
learning
lesson
male
one
papers
person
portrait
preschool
pupil
ruler
school
schoolchild
sitting
smiling
writing