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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.宋庆龄是上个世纪具有世界广泛影响的重要历史人物，她为中国的民主革命奋斗终生，是中华人民共和国的缔造者之一，伟大的爱国主义，民主主义、和平主义和共产主义战士。她还在童年的时候，就认识了民主革命的伟大先行者孙中山先生，并以他为偶像，萌生了革命的志向。她从美国留学归来，正逢民主革命遭受严重的挫折，处在最艰难的时候，她毅然抛弃一切，投身革命，追随孙中山先生出生入死，南征北战，在血雨腥风的战争年代，救治慰问伤病员。她不顾自身安危两次智救孙中山脱险，并协助孙中山完成革命理论的撰写。在孙中山屡遭挫败对革命前途深感茫然之际，她及时协助他实行联俄、联共、扶助农工的新方针，推进了中国民主革命的深入发展。孙中山逝世后，在蒋介石发动“四·一二”叛变后，她团结国民党内的左派与蒋介石之流进行了殊死的斗争，并与投向蒋介石反动政权的宋氏家族彻底决裂。随后她出访苏联，旅居柏林，潜修马克思主义，认清了中国革命唯一的希望在中国共产党。此后，她坚定不移追随中国共产党，在白色恐怖下，她积极开展社会活动，组建“中国民权保障同盟会CS1, …Note: The above codes are all done according to the book. They all read the code of the book. The most important thing is that we understand the implementation of the policy mode. For example, the above form verification function is the code packaged in this way. We usually use JQuery plug-in form verification code to be packaged in this way. Therefore, we can also use this method to package forms and other learning in the future.TV动画#我让最想被拥抱的男人给威胁了#放送约3年后，终于决定将于2021年秋天上映的剧场版。　　他的确赢得了其他人（包括与他同行的另外三位特工）的尊重，但……他的这次行动是未经授权的。