你的提示词
末尾高亮的部分根据你的信息和调节生成。与提示词冲突时，以它为准。
Turn the file into a 2D animated video, using a BBC-style voice, with English narration and English subtitles.
regarding video effects / script completeness / voice matching / music and sound-effects coordination, Choose those by yourself为获得最佳效果，请使用以下模型运行： Claude Opus 5.5.