MALE PROFESSOR: Second, we did some radar imaging from satellites from above. Radar can get through the clouds.So, what have we learned? Yes, Karen?

FEMALE STUDENT: Well, I remember reading that there’s not really a lot going on… that the surface of Venus is just flat and smooth in a lot of places…

请问老师，如何分析there’s not really a lot going on

我的理解，这里的going on是下面的用法，go on 做后置定语修饰a lot，或者这是一个口语省略？

■发生，(活动)进行：

There is a wedding going on at the church.

教堂正在举行一场婚礼。