1. 布置警戒线戒严：condemn 谴责 | cordon off 布置警戒线戒严 | crackdown 取缔、制裁、镇压

2. 封锁：Air force base 空军基地 | Cordon off封锁 | Cordon 警戒线

3. 用警戒线隔离[阻挡]：cordoban || 马臀革 | cordon off || 用警戒线隔离[阻挡] | cordon sanitaire || 防疫封锁线

4. 用警戒线隔离：The police said that the public should be vigilant.警方表示公众应保持警惕. | 34.cordon off:用警戒线隔离. | The police has cordoned off the town centre.警察用警戒线围住市中心.

verb

1. divide by means of a rope

    e.g. The police roped off the area where the crime occurred

    Synonym: rope inrope off