英文關鍵字
education
teacher
wash
female
wipe
chalk
person
blackboard
chalkboard
classroom
school
university
lesson
learn
student
woman
board
study
college
people
background
writing
space
teach
tutor
green
class
clean
rag
concept
英文關鍵字
education
teacher
wash
female
wipe
chalk
person
blackboard
chalkboard
classroom
school
university
lesson
learn
student
woman
board
study
college
people
background
writing
space
teach
tutor
green
class
clean
rag
concept