zhè / cì / huó / dòng / de / jiāo / tōng / jǐng / wèi / gōng / zuò / yóu / jiāo / jǐng / dà / duì / fù / zé

这次活动的交通警卫工作由交警大队负责。

The traffic security work for this event is the responsibility of the traffic police brigade.