And so did you learn to represent these contour lines as isolines?

那你学会用等值线这些等高线了吗？

So the way we did that was we took the contour lines from the existing mountains, and we took those lines and then translated them into a building.

所以我们这样做的方法是从现有的山脉中提取等高线，然后将这些线转化为建筑物。

And I just apply it under and up with my light contour lines that I did before.

我只是将它应用在我之前做过的浅色轮廓线上下。

The best way to practice this is to simply do contour lines on everything.

练习这点的最佳方法是简单地在所有东西上绘制轮廓线。

So from this one experiment we learned the masses of the earth, the sun, the moon, the other planets and their moons, and got contour lines into the bargain.

因此，从这个实验中，我们了解了地球、太阳、月亮、其他行星及其卫星的质量，并得到了等高线。

Well we are going to use this idea of contour lines as an analogy to talk about equipotential lines in electric fields.

我们将使用等高线的概念作为类比解中的等势线。

These contour lines represent how you should actually be placing your brushstrokes.

这些轮廓线代您实际应该如何放置笔触。

And so in a topographic map those contour lines are going to show areas of equal elevation.

在地形图上，这些等高线会显相同高度的区域。

It is on the contour line, which is a line of equal elevation and therefore a line of equal gravitational potential energy.

它位于等高线上，等高线是条等高的线，因此也是条等重力势能的线。

And so those are contour lines, lines of equal elevation.

那些就是等高线，即等高程的线。

Because that is going to be a contour line, a line of equal elevation.

因为那将是条等高线，条等高程的线。

But on the sides, when those contour lines are really close together that means it is really steep.

但在侧面，当那些等高线非常接近时，那就意味着那里非常陡峭。

And so what can we tell looking at those contour lines?

那么，通过观察这些等高线我们可以知道什么？

Can you pick out something else about these contour lines?

你能从这些等高线中找出其他些特点吗？

And so those are contour lines.

这些都是等高线。

Again these contour lines are showing equal elevation and therefore equal gravitational potential energy.

这些等高线的是等高，因此也等重力势能。

So what we can see is down here on the contour lines, when they are really close together then we are seeing a really steep elevation.

所以我们可以看到， 在等高线上，当它们非常接近时， 就有个非常陡峭的坡度。

And this is going to show the contour lines on the side.

这将显侧面的等高线。

And so before we get to that let's kind of go through the specifics of a contour line.

所以在我们进入正题之前，让我们先了解下等高线的具体细节。

And so you should be able to look at a contour line like this and start to build a three dimensional picture of what that hill looks like.

你应该能够通过观察这样的等高线，开始构建出那座山丘的三维图像。