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From the defender's point of view, this type of attack has proved (so far) to be very problematic, because we do not have effective methods to defend against this type of attack. Fundamentally speaking, we do not have an effective way for DNN to produce good output for all inputs. It is very difficult for them to do so, because DNN performs nonlinear/nonconvex optimization in a very large space, and we have not taught them to learn generalized high-level representations. You can read Ian and Nicolas's in-depth articles (http://www.cleverhans.io/security/privacy/ml/2017/02/15/why-attaching-machine-learning-is-easier-than-defending-it.html) to learn more about this.这就随他们去府衙吧，省得扰了诸位长辈。Suddenly the captain told us to hide. He saw the raft floating back again. Because the umbrella anchor was placed before, the impact of the current was increased, and the fishing boat drifted forward and caught up with the raft.一场严重意外让班（Pablo Pauly 饰）进了复健中心，连洗澡、更衣、走路都无法自理，遑论上场打他最爱的篮球。班在中心里认识的新朋友皆是四肢瘫痪、下肢瘫痪或创伤性脑损伤的重度身障者，一群人被生理障碍折磨到精疲力尽、互相谩骂却又彼此提携，并一同学习耐心的重要。他们挣扎着踏上「重生」之路，经历一段混杂成功与挫败、泪水与欢笑的旅程，途中结识各式各样的人——痊愈，并非孤军奋战。说完对青木青山道：别理他，咱们先进去。聊到夜深，黎水不由自主地打了个哈欠，话语有些含糊不清起来，黎章便轻声道：睡觉吧。30年代上海滩，叶飞的父亲魔术世家锦荣班班主叶锦荣因挑战德国魔术师胜利后被其他魔术班排挤迫害含恨而终，叶飞北上拜在名师门下学成之后回到上海为父报仇。之后得上海黑帮老大之女萧瑶倾慕。抗战爆发，叶飞与黑帮联手截获日军大批军火送给共产党，萧瑶也因保护叶飞身亡。叶飞报仇后逃到重庆参加文艺义演为前线募捐，在一次前线演出时与鬼子遭遇，队长李蓉冒死救出重伤的叶飞，两人组成了家庭，并帮助地下党完成了解放上海的任务。新中国成立之后，叶飞来到萧瑶的坟前，碰到了从美国抱着萧海昇骨灰回来的权叔，两人默默的站在坟前，几十年的风雨沧桑，血泪往事如过眼云烟历历在目，而这些都见证了一位伟大魔术师为理想，为爱情，为尊严，为民族而付出的传奇一生。