英文關鍵字
abacus
accounting
age
arithmetic
back
beautiful
body
boy
calculation
caucasian
child
childhood
classroom
clever
depth
develop
director
doing
education
elementary
experienced
field
finance
financier
focus
front
glass
glasses
him
his
holding
home
homework
intelligence
kid
kindergarten
knowledge
learn
lesson
little
math
mathematical
mathematics
mental
method
multiplication
number
part
preschool
preschooler
pretty
primary
remembering
school
schoolboy
scientist
scores
selective
shallow
smart
teaching
thinking
trained
wearing