英文關鍵字
attack
call
cell
cellphone
code
communication
computer
connection
conversation
crime
criminal
cyber
cyberspace
danger
exchange
hacker
hacking
identity
illegal
indoor
information
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korean
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late
listening
male
man
message
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notebook
online
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person
phone
programmer
programming
room
screen
security
smartphone
speaking
system
talking
technology
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web