action of patrolling
group of people that patrols an area
go at regular time round (an area, building) to see that there is no trouble, that no one is trying to get in or out illegally, etc.
Fighter aeroplanes..could not be on patrol in the air all the time.
出自： A. J. P. Taylor
Four members of the guard, returning from a patrol of the barrack perimeter.
出自： M. Dewar
Numbers of armed guards patrolled around them.
出自： W. Irving
Dispatch riders patrol up and down the convoy, seeing to it that the trucks keep even distance.
出自： B. W. Aldiss