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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.1. Equal Employment and Equal Pay for Equal Work钟离昧道：不过，董翳并未直接进入商丘，而是转道成武，逼近单父和沛县。《幽灵》是一部讲述网络空间故事的电视剧，主要描写了在顶级计算机背后隐藏的网络调查科队员们的故事以及他们打击网络犯罪的过程。2011年大热的悬疑剧《Sign》的金亨植导演和金恩熙编剧再次连手合作。剧中，苏志燮扮演网络调查队的冷酷刑警金宇炫，此角色作为警察高级干部的独生子，以第一名的成绩进入警察部队，有着天生的集中力和使命感，但却是个原则至上主义者，成为参与整顿警察厅网络搜捕队组织体系的核心人物。珍爱的传家古董如有破损，损失的远不仅仅是金钱，更重要的是对先祖对家人的怀念。英国乡间的修理店修补古老物件，每件旧物后面都有一个感人的亲情故事。一名警察在经过内部调查后被停职，他在全国各地游荡，寻找自己的网恋对象。