英文關鍵字
shield
check
mark
security
safety
virus
online
internet
technology
protection
guard
icon
sign
symbol
concept
idea
access
cyberspace
data
lock
guarantee
privacy
business
industry
communication
connection
network
computer
monitor
screen
table
top
desk
desktop
wooden
modern
city
tower
office
skyscraper
skyline
urban
building
outdoor
exterior
copy
space
empty
blank