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Similar to the development of children from appearance and color to older children, they can be classified according to concepts. For example, if they know the concept of "food", no matter what kind of vegetables they look like, they should be classified into one category. The classification of biology has also developed in this way. The earliest method is to identify and distinguish species according to phenotypic characteristics, and to classify them step by step according to the degree of phenotypic similarity, so as to establish a classification system that is easy to retrieve. This is the principle of phenotypic classification. However, the problem of phenotypic classification is that it is difficult to reveal the essential laws of things. Many creatures with very different shapes may have kinship relationships. For example, the online sentence "When I knew sunflowers belonged to Compositae, I collapsed" is what it means.玉米那小子也机灵，我也满意的很。We have seen that combining an OrderPizza method with a factory method (that is, the two methods in FactoryPizzaStore) forms a framework. In addition, the factory method encapsulates the production knowledge into each creator subclass, which can also form a framework.这是一个关于一群小屌丝的伟大构想，五个不靠谱的成员，一个“求必应”的帮忙公司，帮助甲方实现梦想，搞定难题，满足各种奇葩甲方的各色需求，演绎最当下的大荒诞，小真实。公司口号：求必应！求必应！一切问题都搞定！过程中，有不懈努力的成功，也有滑稽可笑的失败，演绎了一段爆笑连连的欢乐人生。我们的老熟人, 行政事务部（DAA）大臣吉姆哈克上位成功了! 在公务员体系的化身, 内阁秘书汉弗莱阿普比爵士和走钢丝大师, 私人秘书伯纳伍利同学辅佐下, 经过三年艰苦磨练(磨蹭和训练), 哈克终于入主唐宁街十号, 成为英国首相!项羽沉默片刻，叹道：都是寡人不好，以前都太忙了，没能多关心你，以后会补偿的。