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1.municipal government 市政府
例句：How does Beijing Municipal Government manage to do it?
北京市政府如何才能做到这一点呢？
2.air pollution 大气污染
例句：They devised proposals to deal with air pollution.
他们构想出处理空气污染的方案。
3.peak traffic 高峰
例句：Up on the roofs of large buildings, meanwhile, the carriers are installing wireless routers to offload about 20 percent or more of the peak traffic to Wi-Fi.
与此同时，在大型建筑物的屋顶上，运营商正安装无线路由器来把大约20%以上的高峰期流量转移到Wi-Fi上去。
4.state media 官媒
例句：State media said the power failure knocked out an electronic safety system that should have alerted the second train to the problem.
官方媒体报道电源故障破坏了那原本应该警惕通知第二辆火车发生的问题电子安全系统。
