英文關鍵字
1080p
academic
attentively
boy
child
childhood
class
classroom
computer
concentrated
concentrating
cute
definition
desk
development
early
education
electronic
elementary
focused
hd
high
highdef
keyboard
knowledge
learn
learning
male
mixedrace
mouse
one
person
pupil
room
school
schoolchild
screen
serious
sitting
technology
thoughtful
typing
using