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