英文關鍵字
abacus
arithmetic
calculation
caucasian
child
childhood
count
cute
education
female
girl
home
homework
kid
learn
learning
math
mathematics
movie
people
school
sitting
smart
student
study
studying
teenager
video
young
英文關鍵字
abacus
arithmetic
calculation
caucasian
child
childhood
count
cute
education
female
girl
home
homework
kid
learn
learning
math
mathematics
movie
people
school
sitting
smart
student
study
studying
teenager
video
young