警戒线

yuè guò jǐng jiè xiàn

越过警戒线

pass the danger mark

jǐng fāng de jǐng jiè xiàn zǔ dǎng bù zhù rén qún

警方的警戒线阻挡不住人群。

The police cordon was unable to hold back the crowd.

bù duì zài lǚ guǎn zhōu wéi bù zhì le jǐng jiè xiàn

部队在旅馆周围布置了警戒线。

The army had thrown a security cordon around the hotel.