検索内容:
patrol boat
The patrol boat is patrolling the sea area.
area of sea
Fishing is prohibited in this area of the sea because it is protected.
going around / (a doctor's) round / (a police officer's, a guard's) patrol
I go around this area every day.
go around / patrol / make one's rounds
Every day, I go around this district.
surveillance
We are under 24-hour surveillance.
to observe, to monitor, to supervise
We observed the phenomenon all night long.
ship, vessel, larger ship
We went on a trip on a big ship.
ship, vessel, large ship
surveillance network
The government is building a nationwide surveillance network.
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