It's where marginal revenue equals marginal cost.

是边际收益等于边际成本的那点
I should have picked on some of the SOM people by the way.

我真应该找一个管理学院的人来回答
It's where marginal revenue equals marginal cost, right?

是边际收入等于边际成本那点对吧
The reason I should pick on the SOM people,

我为什么要找管理学院的人回答呢
is their ambition in life is to run a monopoly, right.

因为他们人生最大追求就是要搞垄断
Trouble is I haven't drawn the marginal revenue curve yet.

但问题是我们现在没有边际收入曲线啊
Right, you can't actually see the marginal revenue here.

实际上你们不知道边际收入是多少
What does the marginal revenue look like in this picture?

这个图像中的边际收入是什么呢
Why don't we go to the same guy, the guy in brown.

请穿棕色衣服的同学来回答吧
Where's the marginal revenue,

边际收益是什么样子的
what's the marginal revenue look like in this picture on the left?

左图中的边际收益图像是什么样的
It's half the slope of the price.

它等于价格曲线斜率的一半