见下.这里的activity 为什么不用复数?There has been a significant amount of activity within the company that has required unparalleled focus and energy to ensure future success
问题描述：
见下.这里的activity 为什么不用复数?
There has been a significant amount of activity within the company that has required unparalleled focus and energy to ensure future success
答
公司为了获得需要前所未有的关注和能源,以确保未来的成功,已经有了很多重大的活动.
这里的activity是泛指,所以用单数不可数来表示.
个人意见