These patrolling aircraft observe the movements of enemy leaders, thwart roadside bomb crews, monitor radio traffic, and perform other intelligence-gathering missions.
这些巡逻机侦察敌方首脑、布放路边炸弹人员、微型无线电通信的行踪以及执行其他收集情报的使命。
The additional coverage includes more armed officers and sniffer dogs patrolling subway stations as well as more frequent bag checks and increased surveillance of high-traffic areas.
这些措施包括，派遣更多军官和嗅探犬在地铁站巡逻，更频繁地对行李进行检查，加强对交通流量比较大的地区的监控。
The additional coverage includes more armed officers and sniffer dogs patrolling subway stations as well as more frequent bag checks and increased surveillance of high-traffic areas.
这些措施包括，派遣更多军官和嗅探犬在地铁站巡逻，更频繁地对行李进行检查，加强对交通流量比较大的地区的监控。
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