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However, because the server cannot get the Referer at all times, it cannot be used as the main means of CSRF defense.小城市女孩叶子来到大城市，在一家小便利店打工。叶子父亲早逝，她早早离家为母亲还债，同时供养正在读书的弟弟。生活虽然困难，但叶子相信只要坚持就能得到幸福。看似平凡的一天，叶子准备还掉最后一笔贷款，希冀从此后可以开始自己崭新的人生。然而时尚摄影师夏天无意闯入了便利店与叶子邂逅。一系列阴差阳错后，叶子还债的梦想几乎破灭。夏天深夜发现失误赶回便利店还钱。叶子经过一天情绪折磨，从夏天手中接过还带着他体温的还钱，叶子无声哭了出来。这是她在大都市，陌生人中体会到的第一份温暖。城市另一端，时尚摄影师夏天和顶级名模Flora被称为黄金搭档，功成名就。然而夏天内心渴望简单直接的生活，他渴望成为记录野外生活摄影师。女友Flora对于名利圈生活念念不忘，夏天疲于应付终于选择分手。夏天在便利店女孩叶子身上看到了自己向往的纯净美好，他们之间的距离看似遥远，然而夏天却不由自主被叶子吸引，终于他跟随叶子开始相信：只要坚持，幸福就一定会降临……这里是“Dunder Mifflin”纸业公司一家小小分公司的办公室，在头脑非常脱线的区域经理迈克尔（史蒂夫·卡瑞尔 Steve Carell 饰）领导下，一群办公室职员的生活每天充满古怪趣味。吉姆（约翰·卡拉辛斯基 John Krasinski 饰）是个诙谐、脑子灵活的恶作剧狂人，整天想出不同点子折腾坐对面的学究型同事杜维特（雷恩·威尔森 Rainn Wilson 饰），后者每每气恼不已，也在工作上暗自对吉姆使坏，还视他做升职最大竞争对手；吉姆的恶作剧搭档是前台女孩潘（珍娜·费舍 Jenna Fischer 饰），两人制造出无止境的欢笑，但潘已经有了未婚夫，吉姆对她动心也只能发乎情止乎礼。办公司里还有脾气古怪的大龄剩女安吉拉（Angela Kinsey 饰）、深受迈克尔歧视的同性恋会计奥斯卡（Oscar Nuñez 饰）、拼命想融入大家都实习生瑞恩（B.J. Novak 饰），无论大家性格合拍与否，彼此的共识都是，经理迈克尔是整间屋最大的极品……本剧是英国BBC情景喜剧《办公室》的美国版。项梁身亡？听到最后一句，范依兰停留在花圃边，摆弄花枝的芊芊素手不由的一滞。For codes of the same length, theoretically, the further the coding distance between any two categories, the stronger the error correction capability. Therefore, when the code length is small, the theoretical optimal code can be calculated according to this principle. However, it is difficult to effectively determine the optimal code when the code length is slightly larger. In fact, this is an NP-hard problem. However, we usually do not need to obtain theoretical optimal codes, because non-optimal codes can often produce good enough classifiers in practice. On the other hand, it is not that the better the theoretical properties of coding, the better the classification performance, because the machine learning problem involves many factors, such as dismantling multiple classes into two "class subsets", and the difficulty of distinguishing the two class subsets formed by different dismantling methods is often different, that is, the difficulty of the two classification problems caused by them is different. Therefore, one theory has a good quality of error correction, but it leads to a difficult coding for the two-classification problem, which is worse than the other theory, but it leads to a simpler coding for the two-classification problem, and it is hard to say which is better or weaker in the final performance of the model.嬴诗曼坐在榻边，看着窗口尉缭的背影，说道：今日见过了越王两外两位夫人，可否是天仙一般的日人物，容貌不输于我们子夜。