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保罗（查尔斯·布朗森）自从十年前妻子被杀、独生女遭人强暴后，便成了独行私刑队员，他发誓要扫荡街头暴力，不让更多人和他一样遭到丧亲之恸。媒体和群众将他当成英雄，警方却禁止他回到纽约；然而，当他的老友被冷血地杀害后，保罗毅然决然要为他寻求正义，警方虽然知道他是要回来复仇的，但这次却很欢迎他回来。。一对即将结婚的新人用3D打印机复制出了立体的自己；一个博物馆用3D打印机修复破损文物；一名设计师用3D打印机打出幻想中的作品；一位医生用3D打印机为患者打印植入人体的骨头。本片用几个现实生活中的实例，揭开3D打印机的神秘面纱，展示这种新技术不可思议的神奇功用。。The Yangtze River Bridge in Nanjing is one of the most famous bridges in China. It is also the most popular place in the world to commit suicide. For the past 11 years Chen Si has been patrolling this bridge, looking to provide aid for those who've gone there to end their lives. Incredibly, he has saved over 300 people since he began - nearly one every two weeks. 南京长江大桥是中国最著名的桥...。