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Đồng nghĩa
surveillance
/sɚˈveɪləns/
US
UK
noun
[noncount] :the act of carefully watching someone or something especially in order to prevent or detect a crime
government
surveillance
of
suspected
terrorists
The
bank
robbery
was
recorded
by
surveillance
video
cameras
.
electronic
surveillance [=
the
act
of
using
electronic
devices
to
watch
people
or
things
]
The
police
kept
her
under
surveillance. [=
watched
her
closely
]
US