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Surveillance

Surveillance

(n)
UK
sɜːˈveɪləns
US
sɜːrˈveɪləns
Definition: Close observation, especially of a suspected spy or criminal.
Meaning: Sự giám sát
Not Common
How to use "Surveillance" vocabulary in sentence (example)

The police and the FBI are using drones for surveillance and sting operations.

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It was an integrated military defensive system with watchtowers for surveillance, fortresses for command posts and logistics, beacon towers for communications, etc.

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