a strong protective barrier that is erected around a racetrack or in the middle of a dual-lane highway in order to reduce the likelihood of severe accidents
双语例句
用作名词 (n.)
Ideally, the cars slide along this wall or crash barrier and dissipate energy and speed. 理想上，赛车沿着这面墙或者是防撞护栏消散冲击力和速度。
