本文在分析课程BBS论坛内容和访谈学习者、指导教师的基础上,描述了BBS讨论活动中未能或难以实现学习目标的四类漂移现象,包括问题讨论缺乏深度、讨论活动偏离主题轨迹、讨论内容有大量冗余信息,以及挑起与主题缺乏相关性的无聊话题等。 Based on the analysis of the contents of the BBS forum and the interviews with learners and tutors, this paper describes the four types of drift phenomena that fail to meet the learning objectives in the BBS discussion activities, including the lack of depth discussion of the topics, the deviations of the activities from the topic track, and the discussion There is a lot of redundant content in the content, as well as provoking boring topics that lack relevance to topics.