在车顶上的设备可以生成周围环境的详细地图。
The device atop the car produced a detailed map of the environment.
这些车辆还使用了Google通过有人驶车辆收集的详细地图。
The cars also utilize detailed maps, which Google has gathered using manned cars.
这些特点包括一些街道的详细地图，在美国、加拿大和欧洲。
Some of these features include detailed maps for roads and streets in the U. S., Canada and Europe.
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