tunnel perimeter deflection

例句：

1. 1.The tunnel's perimeter is 20 meters wide.
   这个隧道的边界宽度是20米。
2. 2.The tunnel was designed to deflect the heavy traffic around it.
   这个隧道被设计来缓解它周围的重交通压力。
3. 3.Due to the tunnel's design, the vehicles are able to deflect the impact of the collision.
   由于隧道的设计，车辆能够抵消碰撞的影响。