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The second classification principle of organisms is the lineage classification principle aiming at establishing evolutionary lineage. The classification method following this principle is called lineage classification. The representative of pedigree classification is "branch systematics". It advocates that the branches in evolution should be taken as the criteria for identifying and distinguishing classification units and the basis for determining the pedigree relationship of each classification unit. The so-called co-ancestral proximity (similar to a group of people being a grandfather) is used to measure the genetic relationship between different taxa and determine their position in the pedigree. The classification system finally established is an evolutionary pedigree reflecting the history of phylogeny, which is a deeper description of biological relationship. In other words, the basic principle of pedigree classification is that the classification system conforms to the evolutionary pedigree. Pedigree classification is only applicable to organisms and cannot be used for abiotic classification.罗穆卢斯和他的双胞胎兄弟雷穆斯的故事，在公元前8世纪，通过三个人的眼睛看到死亡，孤独和暴力。那就好。当然还有一个原因，此处本是吴国都城姑苏，城池都是在国都的基础上修建，规模可想而知。瑞秋，一个犹太裔美国医生，和一个阿拉伯裔美国政府官员杰克，在整个中东地区进行着一场徒劳的追逐，试图解决蕾切尔的寻宝兄弟的神秘死亡。从洛杉矶到约旦的沙漠，再到古城佩特拉，他们发现自己被一个叫做阿勒斯顿的世界末日团体所追捕，他们相信瑞秋和杰克拥有失踪的死海卷轴，这可能会导致末日的来临。