I will make 20 videos for this course, the first is just the 4 min intro explaining the course, the last will be a dedicated exam tips video and then obviously the 18 videos in between will be your modules.
我会为这个课程制作 20 个视频，第一个视频时长 4 分钟，介绍这个课程，最后一个视频专门教授考试技巧，中间的 18 个视频对应不同的模块。