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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.6 "Flash" refers to a signal lamp that flashes 120 times or more per minute at regular intervals.郑氏移到婆婆跟前，低声劝道：娘，这世上的人各式各样的。Freeform宣布预订Lonely Island创作的喜剧《一起单身的日子 Alone Together》，Esther Povitsky和Benji Afalo将担任主演，同时也担任编剧和制作人。《一起单身的日子》描述两个来自不同家庭背景，被社会忽视的年轻人Esther 及Benji，他们想融入洛杉矶这个虚荣且多种文化交缠的社会。庆幸的是，两人因此产生了柏拉图式的友谊。**Succus自古以来，如有奇人问世必天降异象。据说“隋炀帝”杨广出生的当天晚上本来皓月当空，明月如镜。当深宫中传来一声婴孩啼哭声之时，突然雷声大作，刹那间天昏地暗，倾盆雨注… 一座古色古香、雕梁画栋的高大仿古建筑坐落在北京和平门外琉璃厂西街，那便是始创于康熙十一年，迄今已有三百余年的历史老字号松鹤斋……