an accident in which a train crashes into something else or comes off the track 列车撞车事故；列车脱轨事故 - (informal)
a situation, a person’s life, etc. that people find extremely interesting because it lacks order, is very bad or is unsuccessful 混乱失序的局面，灾难式的人生（因太过混乱、糟糕或倒霉而使人们觉得有趣） She gives a train wreck of a performance in the movie. 她在电影中的演出烂透了。 This guy is a train wreck. 这个男人的人生简直就是一场灾难。