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1853年10月20日，因争夺对巴尔干半岛控制权，土耳其、英法等国先后向俄宣战，战争持续至1856年，以俄国失败告终。战争的失败引发了俄国国内的一系列变革，其中也包括了废除农奴制。-Coding: N categories are divided M times, and one part of the categories is divided into positive classes and the other part is divided into negative classes in each division, thus forming a two-classification training set. In this way, a total of M training sets are generated, and M classifiers can be trained.Lins' eldest son 04Wonderful Reading: Symbols and Meaning of Time Relay王小羽音乐考试挂科后躲在家里吃瓜追剧，却意外乱入剧中。通过随身带来的沙发和遥控器，一边无意打乱剧情，一边努力修正，最终与剧中角色建立了深厚的感情，最后发挥所学，通过音乐帮剧中角色赢得比赛，实现自我成长。This principle means that there are no methods in each interface that subclasses cannot use but must implement. If not, the interface must be split. It is better to use multiple isolated interfaces than to use a single interface (an interface where multiple interface methods are assembled into one).2572