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Four self-driving buses began trial operations in south China's Shenzhen, a city known for its high concentration of hi-tech companies. 日前，在以高科技公司高度集中而闻名的中国南方城市深圳，四辆自动驾驶公共汽车开始了试运行。 The smart buses, which are smaller than an ordinary bus, began running on a 1.2-kilometer route with three stops in the bonded zone of Futian. 这些智能公交要比普通的公交小一些，在福田保税区的一条1.2公里、有3个公交站的路线上开始行驶。 | 
