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板栗见她这样，心里暖暖的。You will also see this kind of green machine, which is relatively old.Generally speaking, a delegate is a class that maintains a field inside and points to a method. Events can be regarded as variables of one delegate type, and multiple delegates or methods are cancelled through event registration. This article uses delegate and event execution methods to understand the difference between the two.森林泰山（George of the Jungle）是迪士尼1997 年推出的卖座喜剧电影，票房上飚出漂亮的成绩，更捧红了担任本片男主角的 Brendan Fraser。本片故事叙述一位从小被猩猩所养大的 George 意外救了来到野外的美女 Ursula，两人因此谱出恋情，但是 Ursula 却有一位不死心的未婚夫，趁著 George 与 Ursula 远赴旧金山，偕同几个盗猎者要抓那只会说话的猩猩去卖钱，George 接到鸟儿的通知，于是火速展开救援，阻止了坏人的阴谋。还别说，在荥阳城里，府邸的规模与富丽堂皇程度，郑家仅次于汉王府。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.