You try to stop but you can't, your brakes don't work.

你无法让电车停下来，因为刹车坏了。

耶鲁公开课 - 公正课程节选

And down the track comes a trolley car, at the end of the track are five workers, the brakes don't work, the trolley car is about to careen into the five and kill them.

电车沿着轨道从远处驶来，轨道的尽头有五名工人，电车刹车坏了，这五名工人即将被撞死。

耶鲁公开课 - 公正课程节选