好了，现在看清楚了：在这个地球切面上，我们深入地心的这把光剑和赤道线的夹角就是我们的纬度啊！

Now it becomes clearer: on this plane, the angle between the light from the light saber and the Equator is our latitude!

youdao

But I can't see that little box, so what I'm going to do is i'm going to redraw that little box.

但是现在这个小方格看不太清楚,接下来我重新画一下这个小方格

耶鲁公开课 - 博弈论课程节选