英文關鍵字
listen
lesson
phone
app
line
symbol
online
education
book
international
library
internet
test
examination
student
graduate
linear
application
teacher
listening
educational
college
brainstorming
cloud
storage
reading
class
courses
downloading
video
worldwide
literature
information
training
icon
motion
graphic
animation
pictogram
hd
animated
item
sign
black