以下为句子列表：
英文: Beijing's police are scheduled to launch its first ever virtual police patrol mission on leading web portals in the city starting September 1st, The Beijing News reports.
中文: 据北京新闻报道，北京警方计划从9月1日起开始对该市主要门户网站执行首次虚拟警察巡逻任务。
更详细...
英文: Police patrol the streets at night.
中文: 警察晚间在街道上巡逻.
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