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学术研究的演进都有个从研究到“研究的研究”的深化过程,也就是进入学术史的发展阶段,任何一个体系完备、理论成熟的学科都有这么一个过程。广播是科学技术进步的产
The evolution of academic research has a deepening process from the research to the research of the research. That is to say, it has entered the developmental stage of the academic history. There is such a course in any discipline with complete system and mature theory. Broadcasting is a product of scientific and technological progress