So, the contour plot looks like that.

等高线图看起来是这样的。

Label a contour plot.

形网格绘制等值线。

So, what contour plot looks something like this?

因此，等高线图看起来就像这样？

So, now, I'm picking a point on the contour plot.

现在，在等高线图上取一点。

So, the contour plot, well, let me actually zoom out.

我们来放大它的等高线图。