英文關鍵字
abstract
backdrop
background
banner
black
blackboard
blank
board
cell
chalk
chalkboard
class
communication
concept
creativity
design
drawing
education
eraser
female
hand
handwriting
hardaware
idea
internet
letter
message
mobile
network
phone
school
simple
sketch
social
student
technology
text
transfer
white
wifi
wipe
wireless
with
woman
womans
word
write
writing