phrasal verbphr vSEPARATEto separate a road, room etc from the area around it so that people cannot go there or use it 隔离,封锁
The roads into the docks were closed off by iron gates.
通往码头的路被铁门封锁了。
Examples from the Corpus
close off• All credit to manager Trevor Francis who boldly selected an attacking side and came so close to pulling off a famousvictory.• With the distress and disturbance it's going to cause, they might as well close it offaltogether.• This closes the opponent off and presents you with a good opportunity to continue the block into the opponent's face.• Following the killings a military order was issuedclosing the Strip off for three days.• Had he completely closed him-self off in the fourthgrade?• Last week, it seemed Dole was coming precariously close to falling off that tightrope.• Close by a couple were kissing, holding each other close to ward off the coldwind that had sprung up.• I could hardly touch her, and each night she closed herself off with Janir.