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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.托马斯决定去挖掘一桩大新闻，深入战争地带报道一起大屠杀，以使自己能够继续留在越南。艾登追随他潜留美回国的钢琴女老师李娜被网络大咖梅云婷邀请为她自闭症的外甥女做家教，发现梅云婷现任男友就是自己青梅竹马初恋谷峰，李娜背着一起美国留学现任男友郑凯和谷峰一次次的幽会，却被博爱善良的梅云婷和正直的郑凯发现，四人在爱情，友情，亲情，激情和各种误解，背叛，憎恨与宽恕交集的背景下，他们各自选择自己不同真爱和坚守道德底线禁区。车夫笑骂道：这他娘笑的，拣着金子了吧。谢谢大家支持《回家》。讲述了Cupids Heart公司工作的Hommalee与导演Pi的爱情故事 。I will try to adjust the parameters according to my understanding of the nature of the data and the theory behind the algorithm. If I cannot explain why the results are getting better or worse, I will find this adjustment strategy unreliable.