英文關鍵字
adult
advice
animation
blackboard
calculation
calculations
class
classmates
classroom
digital
education
exercise
explain
female
interacting
lesson
mathematics
mixedrace
montage
no
people
school
speaking
student
studying
teacher
woman
young
英文關鍵字
adult
advice
animation
blackboard
calculation
calculations
class
classmates
classroom
digital
education
exercise
explain
female
interacting
lesson
mathematics
mixedrace
montage
no
people
school
speaking
student
studying
teacher
woman
young