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