English as a Foreign Language (EFL) students often struggle to deliver oral presentations due to a lack of reliable resources and the limited effectiveness of instructors' feedback. Large Language Model (LLM) can offer new possibilities to assist students' oral presentations with real-time feedback. This paper investigates how ChatGPT can be effectively integrated into EFL oral presentation practice to provide personalized feedback. We introduce a novel learning platform, CHOP (ChatGPT-based interactive platform for oral presentation practice), and evaluate its effectiveness with 13 EFL students. By collecting student-ChatGPT interaction data and expert assessments of the feedback quality, we identify the platform's strengths and weaknesses. We also analyze learners' perceptions and key design factors. Based on these insights, we suggest further development opportunities and design improvements for the education community.

翻译：英语作为外语（EFL）的学生在口语报告方面常常面临挑战，这主要源于可靠资源的匮乏以及教师反馈效果的有限性。大型语言模型（LLM）能够通过提供实时反馈，为辅助学生的口语报告带来新的可能性。本文研究了如何将ChatGPT有效地融入EFL口语报告练习，以提供个性化反馈。我们介绍了一个新颖的学习平台——CHOP（基于ChatGPT的口语报告互动练习平台），并通过对13名EFL学生的评估来检验其有效性。通过收集学生与ChatGPT的互动数据以及专家对反馈质量的评估，我们识别了该平台的优势与不足。同时，我们分析了学习者的感知体验和关键设计因素。基于这些发现，我们为教育界提出了进一步的发展机遇与设计改进建议。