Extended data:
Yuan Wen magazine is a national comprehensive academic theoretical journal of education and social sciences, which is approved by the State Administration of Press, Publication, Radio, Film and Television and sponsored by China Publishing Media Co., Ltd., with the unified domestic issue number of CN 1 1-9276/G and the international standard issue number of ISSN2096-6288. Main columns: education frontier, higher education research, vocational education forum, basic education, teaching forum, management, economic perspective, cultural and sports art, books and archives, information engineering, scientific forum, theoretical wide angle, etc.
99.8% of the existing vertebrates on the earth have jaws (maxilla and chin), which are collectively called jawed vertebrates or jawed animals. The appearance and rise of jaws is o