防疫线的英文：
sanitary cordon

Countermeasures against insects are part of the sanitary environment and sanitary cleanup
抗昆虫的对策也是环境卫生和清洁卫生的一个部分。

and to reaching an agreement on sanitary and phytosanitary issues.
并就卫生与植物卫生问题达成协议

Epidemic disease is often in connection with bad sanitary conditions.
流行病通常是和不良的卫生条件有关的。

Sanitary ware, ie toilet bowls,etc
洁具(抽水马桶等)

Sanitary supervision is the inspection and surveillance over public health.
卫生监督意指对公共卫生的监察和督促。

The police cordoned everything off.
警察封锁了一切。

The demonstrators brpke through the cordon of the police.
示威者冲破了警察的警戒线。

Demonstrators tried to break through the police cordon.
示威群众企图突破警察的封锁线。

Demonstrators attacked police cordons with sticks and assorted missiles.
示威者用棍棒和各种投射物向警察的封锁线进攻。

Police cordoned off the area until the bomb was defused.
警方封锁了这个区域直至拆除炸弹的引信为止.