The explanation, of course, actually isn't that hard to come by.

当然这也不难解释
The worry is that those of us who are harder graders than average,

他们担心我们这些严格的评分者
if the information were published,

在这类信息发布后
would feel guilty and sort of ease up on our grading.

会因为内疚而稍把评分提高
But those who are easier graders

而那些评分本来就比较松的
than average will never feel guilty and toughen up.

根本不会觉得内疚不会因此更严格
So the result would be a constant push up with the grades.

这样一来结果就是分数一直往上升
At any rate,

虽然
I don't know for certainty that I'm a harder grader,

不确定我是否评分严格
but I believe that it's the case

但相信应该就是这如此
based on reactions I get when I give the speech that I'm about to give.

就我每次讲课所得到的反应而言
Okay, so.

就这样吧