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1.life-threatening 威胁生命的
例句：Caitlin was born with a life-threatening heart abnormality.
凯特琳患有可能致命的先天性心脏畸形。
2.train track 铁轨
例句：Train track occupancy recognition is to determine if the train is passing over a switch and to supply reliable information for train positioning system and train control system.
列车轨道占用识别目的是在平行的多轨道区域识别列车所占用的轨道信息，为列车定位子系统或控制系统提供可靠的信息。
3.as a result of 因为
例句：2,000 prisoners died as a result of torture and maltreatment.
2,000名犯人死于拷打和虐待。
4.world-famous 举世闻名的
例句：Harefield Hospital has become world-famous for its pioneering heart transplant surgery.
哈瑞福德医院以其开创性的心脏移植手术闻名于世。
