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在了解清楚行人行动的起点和终点后，行人的运动方向就会形成一条轨迹。行人运动轨迹与机动车运行轨迹的交点就是接触点
After knowing the starting point and ending point of the pedestrian action, the direction of the pedestrian’s movement will form a track. The intersection of pedestrian motion trajectory and motor vehicle trajectory is the contact point