英文關鍵字
black
blackboard
board
categorize
category
chalk
chalkboard
class
classify
classroom
coaching
college
course
desk
draw
drawing
educate
education
educational
font
greenboard
hand
handwriting
handwritten
junior
knowledge
learn
learning
lecture
lesson
letter
lettering
nobody
rank
school
sketch
study
studying
table
teach
teaching
text
type
understand
university
white
word
write
writing