一辆汽车突然刹车，后面跟着的两辆汽车追尾相撞。
One car made a sudden stop and the two cars behind it piled up.
高速公路上发生了一起的汽车追尾相撞的交通事故。
同样，如果你确信智能行驶控制系统能防止汽车追尾相撞的话，“你也许就会打开计算机或干点别的什么事了。” 伦德又说。
Similarly, if you're convinced that an intelligent cruise control system will keep you from hitting the car ahead, "you might be inclined to turn on your computer and do something else, " says Lund.
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