#VOA慢速英语：美国宣布无人驾车汽车指南 搜索结果
USAnnouncesGuidelinesforDriverlessCarsTheU.S.governmenthasreleasednewguidelinesforthefast-developingtechnologyofdriverlesscars.TheguidelineswereannouncedTuesdaybytheDepartmentofTransportation.Theywe
