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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.It began in England in the second half of the 19th century. It was introduced into the European continent in the 1920s and then widely spread in America, Asia and other countries.他是来杀人的，冒着生命危险在侯府内到处寻找白虎侯的家眷。Then my Xun Yu will not give Ping A a bonus but only a halo. It will add 42.78 damage to Tian Feng. Let's try.单身妈妈张映雪，为了给儿子一个良好的生活环境，重拾起旧学护士专业，在医院找了一份工作。在一次机缘巧合下，映雪救了院长之子刘嘉诚，并对其悉心照顾。在映雪妹妹晓君与嘉诚弟弟嘉祐的婚礼上，映雪的前婆婆为要回孙子，大闹婚礼，导致嘉诚之母甄珠对映雪一家产生不满，此事之后更是对映雪和晓君处处刁难。映雪因忙于工作使得儿子意外受伤，失去了抚养权。嘉诚了解了映雪的事情后细心陪伴，两人情意更深。不料刘家突遭横祸，嘉诚之父心力交瘁。映雪感受到了嘉诚的赤诚之心，决定站在嘉诚身边，帮助刘家度过危机，嘉祐与晓君更是在经历风风雨雨后，真正感受到彼此的爱，重新走到一起。四个年轻人，用他们的善良和勇敢，证明了那句老话“家和万事兴”。知子莫若父，加上当年那桩公案内情无人知晓。