英文關鍵字
alert
answer
attention
background
blackboard
board
chalk
chalkboard
character
class
collection
concept
danger
draw
drawing
drawn
education
exclamation
green
group
hand
handwritten
icon
idea
illustration
important
information
interjection
learn
learning
letter
lettering
many
mark
marks
outline
pattern
problems
school
set
sign
sketch
solve
study
symbol
text
warning
white
write
written