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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.该剧以牺牲在雁北抗日战场上的民族女英雄李林为原型，塑造了一个以李林为中心的抗日、爱国、革命、青春的群体。再现了李林、崔小楠、杜大海、刘子豪、肖海云等一系列英雄人物，以他们感人肺腑的友谊、荡气回肠的爱情，褒扬了高尚的人生信念、信仰与理想，赞美了伟大崇高的爱国主义情操，真实地再现了惊心动魄的战争场景、浴血厮杀的悲壮画面。此战他瞅的时机很好，可谓是进可攻，退可守，立于不败之地啊。　　第1集，仲村亨饰演意大利厨师，还有崎山翼共演，玉城蒂娜扮演瑜伽教练，森田甘路出演一名游戏宅。小葱见秦淼偶尔瞟一眼葫芦，神情羞怯又欢喜，再看一旁的板栗，也是面带笑容，但她却忍不住替哥哥心酸。她心里不安，扯着张槐胳膊轻声叫道：槐子哥。From this perspective, the attack power of this strange dog on position 142 is no lower or even higher than that of the humanoid monster on position 169.