英文關鍵字
private
school
text
blackboard
hand
drawing
animated
black
chalkboard
education
type
greenboard
learning
educate
knowledge
study
learn
rank
category
class
classify
categorize
chalk
board
coaching
desk
draw
font
college
university
handwriting
handwritten
lecture
lesson
letter
lettering
sketch
studying
teach
teaching
white
word
write
writing
classroom
junior
technical
table