Public lighting that adapts and dims when there's no activity but brightens up when sensors detect motion.

公共照明在没有活动时会自动调暗，但会在传感器检测到运动时变亮。

I have therefore selected, as typical, the operations of the group that developed the street railways and, to a certain extent, the public lighting companies, in our three greatest American cities — New York, Chicago, and Philadelphia.

因此，作为典型，我选择了在美国三个最伟大的城市——纽约、芝加哥和费城——开发街道铁路和在一定程度上开发公共照明公司的集团的业务。

An attempt to trace the convolutions of America's street railway and public lighting finance would involve a puzzling array of statistics and an inextricable complexity of stocks, bonds, leases, holding companies, operating companies, construction companies, reorganizations, and the like.

试图追踪美国街道铁路和公共照明金融的盘旋将涉及一系列令人费解的统计数据以及股票、债券、租赁、控股公司、运营公司、建筑公司、重组等不可分割的复杂性。