In an industrial corner of Pittsburgh’s Strip district lies a quiet alley lined with rusted steel beams. They support an old railway bridge that hints at this steel town’s past. But tucked at the end of the alley, hidden from the view of passers-by, sits a gleaming research centre that points to a rather different future, one in which self-driving taxi fleets will have revolutionised urban transportation.
在匹兹堡市横排区(Strip District)一个工业区的角落，有一条僻静的小巷，巷子里成排地竖立着生锈的钢梁，它们支撑着一座旧铁路桥，提醒人们该钢铁城的过去。但在小巷尽头路人看不见的地方，却坐落着一幢明晃晃的研发大厦，预示着一种截然不同的未来——无人驾驶出租车将掀起城市交通的革命。
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