英文關鍵字
five
people
child
boy
male
mixedrace
girl
female
caucasian
mid
adult
woman
animation
clock
happy
diverse
teacher
explaining
pupil
class
school
childhood
education
teaching
learning
digitally
generated
video
classroom
lesson
student
study
knowledge
studying
college
university
learn
elementary
digital
montage
book
kid
young
lecture
homework
children