An isogon is a contour line for a variable which measures direction.
等角线是用于测量方向的变量的轮廓线。
This effect is called an "illusory contour.
这种效应叫“错觉轮廓”（illusory contour）。
But, the contour plots look exactly the same.
然而，等高线图是完全一样的。
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。
OK, so that's an example of a contour plot of a function.
这就是一个关于函数等高线图的例子。
That is the contour plot of f with a hyperbola on top of it.
上面这个是f的等高线，黄色的就是双曲线。
So, here I have a contour plot of a function, and I have a blue vector.
我这里有一个函数的等值线图，还有一个蓝色的向量。
And then, the contour plot will be the topographical map for this graph.
等高线就像是这幅图的地形图。
OK, so these are examples of contour plots in real life. OK, no questions?
这些都是现实生活中关于等高线图的例子，有问题吗？
By varying the contour of a shape, you can easily make a page element stand out.
通过变换形状的轮廓线，你很容易就能凸显页面元素。
Having to custom cut each shingle to match the contour of the curves slowed my progress.
为了配合曲线轮廓，必须切削每块木瓦，这减慢了我的进度。
Most page elements have a boxy contour, so this variation will create some unique contrast.
许多页面元素都采用的是框式轮廓，因而这些变化会营造一些独特的对比效果。
we've seen is how to actually view a function of two variables in terms of its graph and its contour plot.
我们学过怎样认识二元函数,从它的图像和等高线的角度来看。
While shapes are mostly defined by a contrast between elements, they're also defined by their contour, or edge.
虽然形状主要是通过元素间的对比来定义，但它们也可以借助轮廓线或边来定义。
Cogg's nook, a little recess tucked into the 150-foot contour line, was perhaps the best place where he could put his hut.
Cogg的藏身洞隐蔽在150英尺等高线处，可能是栖身的最佳选择。
This technique captures the shape of the face and other distinctive features like the contour of the eyes, the nose, and the chin.
该技术可以捕捉脸型和其它明显特征，如眼眶，鼻子和下巴。
And, I'm going to take the same two examples as there to start with so that we see the relation between the graph and the contour plots.
我将举出两个相同例子,这样我们就能看到图像与等高线图的关系。
When supply modulation and contour modulation are working in concert, the dynamic range and efficiency of the power amplifier can be further improved.
当电源调制和轮廓调制协同工作时，功率放大器的动态范围和效率可以进一步提高。
Sadly, after over twenty years have passed since the war ended, many can still only vaguely see the contour of that door as if looking through a veil of mist.
让人感到悲哀的是，战争结束20多年来，很多人仍然只看到这扇大门的模糊轮廓，就像是透过薄雾般的面纱去看这道门。
Though she spent much of the time with her nose in one-inch Ordnance Survey maps, tracking the contour lines, she found them a “coarse instrument” for her purpose.
虽然她皓首穷经地埋首于英国四十万分之一比例尺的全国地形测量地图，追寻每一条等高线，对她的研究目标来说，她仍觉得这份地图算是「粗糙的工具」。
Notice that the yellow fields inside of the heart appear paler than the fields forming the contour of the heart, which appear to be a darker shade of yellow/orange.
你可以看到图中心形里边的黄色比构成心形轮廓的颜色更浅一些，心的轮廓好像是颜色更深的黄或橘黄。
The base contour is enabled along with hidden line removal, and the sinc plot is created with the splot command using the internally available math library functions.
同时还启用了基本的等高线和隐线消除特性，最终的绘图是利用splot命令使用数学库内部的函数来创建的。
Because melody contour may be the only aspect of their mother's speech that newborns are able to imitate, this might explain why we found melody contour imitation at that early age.
因为母亲说话的声调是婴儿最容易模仿的，这或许可以解释为什么音调的模仿开始得这么早。
This natural-color satellite image of the summit of Mauna Loa overlaid with 100-meter (330-foot) contour lines helps illustrate why volcanic emissions from the summit rarely reach the observatory.
上图带有间隔100米等高线的天然色卫星照片显示的是莫纳罗亚山峰顶，它可以告诉我们为什么峰顶的火山喷发极少触及到气象站。
This natural-color satellite image of the summit of Mauna Loa overlaid with 100-meter (330-foot) contour lines helps illustrate why volcanic emissions from the summit rarely reach the observatory.
上图带有间隔100米等高线的天然色卫星照片显示的是莫纳罗亚山峰顶，它可以告诉我们为什么峰顶的火山喷发极少触及到气象站。
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