（尤指车辆）老旧破烂、零件松动、行驶时“哐当作响”的东西；也可指看起来不结实、快散架的装置或机器。（常带贬义、口语）
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That old rattletrap still starts every morning.
那辆破旧的“哐当车”居然每天早上还能发动。
He insisted on driving the rattletrap across the mountains, even though the brakes were unreliable and every bump sounded like the whole car might fall apart.
尽管刹车不太可靠、每次颠簸都像整辆车要散架一样，他还是坚持开那辆破车翻山越岭。
“rattletrap”是复合词，由 rattle（哐当作响、咔啦咔啦响）和 trap（此处可理解为“装置/器械”，也常见于口语里指“东西、玩意儿”）组合而成，形象地描绘了“松散得一动就响”的破旧物件，尤其常用来形容车。
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