英文關鍵字
learning
e-learning
study
online
internet
learn
education
university
school
icon
sign
symbol
concept
idea
business
industry
technology
remote
distance
communication
connection
network
businessman
man
suit
hand
finger
point
click
touch
push
press
select
screen
touchscreen
modern
city
tower
office
skyscraper
urban
building
global
world
map
outdoor
exterior
empty
blank
copy
space