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TelecommunicationsFile://: file data format, followed by file path.In the "Video Learning" section, there are the first video, short video, simulcast channel, theory, party history, massive open online course, characters, culture, literature and art, science, nature, TV series, movies, rule of law, military and other channels. Among them, the "first video" is mainly a video report on the relevant activities of General Secretary Xi Jinping. As its name implies, "simulcast channel" is CCTV news simulcast video. Massive open online course is a free public video course with a variety of courses.除了李由，房内只有一位须发半白的老者，捋着山羊胡问道：将军，可是有什么好消息？李由笑道：不错，上将军章邯上书陛下，让我调兵进驻雍丘，征讨楚地叛军。《陷入纯情》是韩国JTBC于2015年4月3日起播出的金土连续剧，由池英洙导演，柳熙京编剧，郑敬淏、金素妍、尹贤敏、陈久等主演.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.