We could take all of the data that the cars have seen over time, the hundreds of thousands of pedestrians, cyclists, and vehicles that have been out there and understand what they look like and use that to infer what other vehicles should look like and other pedestrians should look like.
我们可以搜集车辆在一段时间内 看到的数据， 数以千计在路上的行人，骑单车的人， 以及其他车辆， 了解他们的外形， 再用之去推理其他车辆 以及其他行人的外形。