I have kept a record of informal conversations involving 300 students.

问题描述:

I have kept a record of informal conversations involving 300 students.
这里的revolving为什么不能用covering来替代呢?
两个都有涉及、包含的意思啊

英语不是中文,不是生搬硬套的.covering主要指的是地域的覆盖