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小葱和秦淼等在出口处的溶洞内，焦躁不安：哥哥已经去了好久了，为啥还不回来？秦淼说不如她们也上去看看，她不许。能屈能伸大丈夫，刘邦正是这一类。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.忽然，板栗先低声笑起来，跟着周菡也笑。大苞谷道：爹放心。离开云纹茶馆时，陈启突然想到老板娘的女儿赵兰说过这家茶馆最低消费似乎是一千。公子，我决不愿做波斯明教的教主，我只盼做你的小丫头，一生一世服侍你，永远不离开你。