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其实这暗语只有张良和李泽之间知晓，别人是没有办法从中作梗的。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.An example解放前期的辽东某镇，粮行家的千金小姐山杏，爱上了长工丁大命，但由于身份地位的差距一直没能在一起。国民党守备团奉命在小镇驻守一个军事秘密，共产党领导的游击队奉命了解并破坏这个军事秘密。丁大命由于帮助了游击队员而加入革命队伍，并留守在关家暗中协助游击队完成任务。然而，丁大命在帮助游击队夺取盘尼西林和米粮这两个事件中先是英勇就义，而后却死而复生，这让一直蒙在鼓里的山杏察觉到他的身份，并跟随他加入革命队伍。虽然如此，两个有情人并没有选择在一起，而是为完成各自任务假意嫁娶他人，并共同揭开了守备团驻守的是一个日本遗留军库这个秘密，但为摧毁军库，丁大命在最后的战斗中英勇就义，众目睽睽之下，所有人都认为他不可能还活着之时，丁大命却拄着拐杖一瘸一拐地出现在阳光之下。公元2035年，是人和机器人和谐相处的社会，智能机器人作为最好的生产工具和人类伙伴，逐渐深入人类生活的各个领域，而由于机器人“三大法则”的限制，人类对机器人充满信任，很多机器人甚至已经成为家庭成员。Surname is a sign and symbol that indicates a person's family and blood relationship. The descendants of the same ancestor are called clans. Surnames originated from the name of the tribe or the name of the tribal leader. Its function is mainly to distinguish the descendants of different clans in the tribe and to facilitate intermarriage between different clans. Therefore, the emergence of surnames marks the change from group marriage to blood marriage and is an important milestone in the progress of human civilization.　　小分队内部的猜忌越来越严重，众人身上仿佛都有疑点，洪风锁定了莫三甲为叛徒，莫三甲却拿出证据证明洪风才是叛徒，小分队一度濒临绝裂……