叙事学认为:叙述的魅力不仅在于讲述了什么内容,还在于这些内容是怎样被讲述的,电视栏目激烈的生存竞争,使得科教节目也一再强调观赏性、趣味性、娱乐性,讲坛类节目也不例外。电视讲坛类节目主要靠主讲人的讲解构成节目的主体,主讲人的讲解是节目的灵魂和核心,在半个小时甚至40 Narratology thinks: the charm of narration not only lies in what is narrated, but also in how the content is described. The intense competition in the field of television makes the programs of science and education emphasize ornamental, interesting, entertaining, pulpit programs No exception. TV forums program mainly rely on the speaker’s explanation to constitute the main program, the speaker’s explanation is the soul of the program and the core, in half an hour or even 40