cordon off

基本解釋

The final footage of him alive shows him walking past the line of police dog handlers, who have formed a cordon blocking off Royal Exchange passage.
他生前的最后一段畫面顯示他走過一列牽著警犬、圍成警戒線堵住人群的警察。
A 200m cordon was put in place, cutting off one of London's major transport arteries and causing further traffic chaos, after reports of the suspicious vehicle.
在報(bào)道有可疑車輛后，一條200米長(zhǎng)的警戎線切斷了倫敦一條主要的交通要道，造成更大的交通混亂。
blog.sina.com.cn
Mr Lai is said to have then broken through the police cordon, climbed to where Mr Chen sat, greeted him with a handshake - and then pushed him off the edge.
賴先生據(jù)說當(dāng)時(shí)沖破警察的警戒線，爬到陳先生所坐的地方，與其握手，然后把他推下去。

During the EP-3 incident various pinheads furthered the impression of an American naval cordon off the Chinese coast.
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Some shopkeepers say they will cordon off parts of their premises to ensure they are small enough to be allowed to stay open.
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If police or soldiers cordon off an area, they prevent people from entering or leaving an area.