cordon
noun
verb
ˈkɔːdn noun
1 a line of police officers, soldiers, or vehicles that is put around an area to stop people going there 警戒线,封锁线
[+ of ]
A cordon of police surrounded the building.
警察组成的警戒线包围了这幢大楼。
[+ around ]
the security cordon around the capital
首都周围的安全警戒线
verb
2 to surround and protect an area with police officers, soldiers, or vehicles 设置警戒线围起
Police cordoned off the street where the murder took place.
警察在发生谋杀案的街上设置了警戒线。