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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.The event is released immediately after execution. For example, if the event is executed immediately, the event will be automatically deleted after execution. The event can be viewed by calling multiple times or waiting for execution.Not only is it used by many athletes in our country, but Dowie can be seen in any weightlifting club abroad.写东方不败的时候，依然是反复看，还代入东方不败，了解她（就用她吧）的想法。描述同樣有艱苦歷練的三個女人之間的友情和成長的故事……然而始成带回来消息，项羽的意思很明确，没有讨价还价的余地。朕若是连这点都不能答应。