translation.en: The lasers scan the environment to detect obstacles -- a car approaching from the front, the back and also any obstacles that run into the roads, any obstacles around the vehicle.
translation.zh: 激光扫描环境来探测障碍物-- 从前方，后方靠经的车辆 同时还有闯进路上的任何障碍物， 在车辆周围的任何障碍物。