Cover a lot of ground:
1.To move across an area at an acceptable speed.
2.To complete something in a particular manner or review a certain amount of information or discuss a certain number of topics.
“Cover a lot of ground” 既可以按字面理解为 “跨越很长的距离”；也可以被用作一种比喻，表示 “提供的信息十分全面，或者教的内容涉及面很广”。这个表达用在教育领域时，通常用来描述 “传授的内容涵盖了很多知识点”。
例句
The book really covered a lot of ground about the Victorian era in England.
这本书讲述了关于英格兰维多利亚时期的方方面面。
The teacher covered a lot of ground in her class. She is a brilliant teacher.
这个老师在课上讲的知识点涉及面很广。她是一位出色的教师。
We need to study hard and cover a lot of ground. Our test is on Monday!
我们必须刻苦复习，涵盖方方面面。下周一就要测验了！
