It's gone from being Brazil's most dangerous city to one of its safest, and it did this by doubling down on information collection, hot spot mapping, and police reform, and in the process, it dropped homicide by 70 percent in just over 10 years.
过去这是巴西最危险的城市， 现在确实最安全的城市， 方法是将加大力量， 双倍增加信息收集、 热点绘图、警方改革， 在十年内凶杀率因此下降70%。