cordon

A police cordon was set up around the shopping mall following reports of a gas leak.

(Chinese) 在收到煤气泄漏的报告后，商场周围建立了一道警察警戒线。

Protesters tried to break through the military cordon guarding the government palace.

(Chinese) 抗议者试图突破保卫政府宫殿的军队防线。

Emergency crews worked to cordon off the crash site to preserve evidence for the investigation.

(Chinese) 应急人员努力封锁坠机现场，以为调查保留证据。

The health department had to cordon off the entire building during the chemical cleanup.

(Chinese) 在进行化学清理期间，卫生部门不得不封锁整栋建筑。