Videos · ⁨视频⁩

Every video walks through one syllabus topic from the start: the idea, the working, and the exam-style examples — narrated in clear English, at the level the notes are written for. · ⁨每个视频从头到尾讲解一个大纲主题：概念、原理与考试样题示例——全程使用清晰的英语旁白，难度与笔记水平一致。⁩

Subtitles are burned in, in English and Simplified Chinese together, so a difficult sentence can be read while it is heard. Difficult terms carry a small Chinese gloss on screen. · ⁨英中双语内嵌字幕，难句可听读同步；生词屏幕显示中文释义小标签。⁩

Each video is chaptered. Use the chapter list to jump to the part you need, and the notes and lessons linked beside it to practise afterwards. · ⁨每段视频均分章节。利用目录跳转至所需部分，并点击旁边的笔记与课程链接进行课后练习。⁩