说明：  这是我在学校内部资料上找到的关于音频和视频学习的资料，我没有分别上传而是打包成一个文件上传，希望对学习者有全方位帮助。
(This is what I found in the school-house information on audio and video learning materials, I did not upload it were packaged into a file upload, hope to have comprehensive help learners.)