英文關鍵字
20s
asian
block
boy
caucasian
child
children
class
classroom
colored
counting
desk
down
education
eight
elementary
female
girl
indoors
learning
lesson
lock
male
math
maths
medium
mixed
old
people
person
plastic
primary
pupil
race
school
schoolchildren
shot
sitting
student
table
talking
teacher
teaching
together
twenties
uniform
woman
women
working
year