英文關鍵字
24
7
info
information
support
service
faq
open
help
icon
letter
i
idea
symbol
blackboard
sign
illustration
internet
concept
inform
helpdesk
communication
ask
data
informative
text
chalkboard
chalk
board
classroom
class
white
learning
assistance
center
online
business
day
seven
week
time
24h
always
anytime
assistant
accessibility
learn
greenboard
green
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