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

那你学会用等值来表示这些等高了吗？

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.

所以我们这样法是从现有山脉中提取等高，然后将这些转化为建筑物。

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过浅色轮廓上下。

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

练习这点最佳法是简单地在所有东西上绘制轮廓。

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、其他行星及其卫星质量，并得到了等高。

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

我们将使用等高概念作为类比来解释电场中等势。

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

这些轮廓代表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，这些等高会显示相同高度区域。

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

它位于等高上，等高是条等高，因此也是条等重力势能。

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

那些就是等高，即等高程。

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

因为那将是条等高，条等高程。

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?

你能从这些等高中找出其他些特点吗？

And so those are contour lines.

这些都是等高。

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

这些等高表示是等高，因此也表示等重力势能。

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， 在等高上，当它们非常接近时， 就表示有个非常陡峭坡度。

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

这将显示侧面等高。

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等高，开始构建出那座山丘三维图像。