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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.老张和儿女们居住在北京胡同中的一个小院里。在老伴过世三年后，老张与乐观善良的李桂香结了婚，可这位继母一踏进张家小院，就不得不面对张家儿女们出的一道道难题：大儿媳生活富裕，却总是担心李桂香来张家是为了争夺张家房产；二儿媳经历了丧夫丧子的痛楚，时至今日也不敢向往幸福的未来；小女儿张圆圆虽然单身，但倔强的性格使她无法与几位嫂子相处。TelecommunicationsPetit Verdot is also called Weierduo in Chinese, the emperor of Wei. Small Vito is mainly distributed in the French Medoc region, and its origin is still unclear. Vito itself has very deep purplish red and strong tannins, which can be used to increase the color and structure of blended wines.一个江湖梦，更蕴含着一段段跌宕起伏、荡气回肠的情义……明月峡私会练姐姐，洛阳绿竹巷中和盈盈弹琴，抑或月下和陆雪琪一同舞剑，阳春三月同碧瑶一起游山。　宇佑传媒、上海远信影视联合出品，根据青衫落拓同名小说改编，#陈键锋#、#贾青#、#周楚楚#、#王钧赫# 、#张倬闻#、#田丽# 、#俞小凡#、#谢闻轩#等主演的都市情感剧#我们的千阙歌#开机拍摄~讲述了法学系的高材生司凌云和顶峰集团上司傅轶则由开始的争锋相对，到彼此了解、相互欣赏，两人的感情逐渐升温后最终收获了一段刻骨铭心真爱的故事