PHRASAL VERB (設置警戒線)包圍,警戒,封鎖 If police or soldiers cordon off an area, they prevent people from entering or leaving it, usually by forming a line or ring. (設置警戒線)包圍,警戒,封鎖
Police cordoned off part of the city centre. [VERBPREP. noun]
警察封鎖了市中心的部分地區。
The police cordoned everything off. [VERB noun PREP.]