Recently, the Chicago Police Department installed permanent cameras and flashing lights atop the lampposts of Madison, bathing each block in a perpetual blue glow.

• 最近，芝加哥警察局在麦迪逊大街的街灯柱上安装了常设摄像头和闪光灯，发出不间断的蓝辉光，监视每条街道。