If I make the total energy positive, it's not an ellipse.
如果我让总能量为正，它就不是一个椭圆了。
Man is not a circle with a single centre; he is an ellipse with a double focus.
人并不是只有一个圆心的圆圈；他是一个有两个焦点的椭圆。
If this is an ellipse around the Earth, this would be perigee and this would be apogee.
如果这是一个围绕地球的椭圆形，那么这是近地点，这是远地点。
The main axis of the planet's orbital ellipse shifts each time when it goes around the sun.
当行星绕太阳运行时，其轨道椭圆的主轴每次都会改变。
One characteristic of Earth's orbit is its eccentricity, the degree to which the orbit is an ellipse rather than a circle.
地球轨道的一个特点是它的离心率，也就是轨道是椭圆而不是圆形的程度。
The Earth orbits in an ellipse.
地球沿椭圆形轨道运动。
It's the focus of the ellipse.
它是椭圆型的焦点。
Another name foran ellipse is an oval.
椭圆的另一个名字叫“卵形的”。
在盒盖的背面画一个椭圆。
你们看到这里的？
Yes? How do you parametrize an ellipse in space?
怎样参数化空间上的椭圆曲线呢？
So here is an ellipse, A here is P and here is A.
所以，这是一个椭圆轨道，这是P，这是。
But, you know, an ellipse is just a squished circle.
但是，你们知道，椭圆只是一个被压扁了的圆而已。
You can see that you have got an oval shaped ellipse.
你可以看到一个椭圆形。
Create an oblong ellipse with the ellipse Tool (l).
创建一个椭圆形椭圆与椭圆工具(升)。
The current National Christmas Tree was planted on the Ellipse in 1978.
现在的这棵国家圣诞树是1978年在椭圆广场栽种的。
Four years later, the 31-year-old is releasing her third album, Ellipse.
四年后，31岁的她发行了第三张专辑，椭圆。
And at time zero, when it is there, it has a velocity in that ellipse.
时间为0时，在轨道上有速度。
One of the citations in the OED entry for ellipse is from a fellownamed Liddell.
在牛津英语词典(OED)里，这个词的一条引用是出自一个叫里德尔的家伙。
Circle-ellipse problem: Subtyping variable-types on the basis of value-subtypes.
是Subtyping variable - typesonthebasisof value - subtypes。
Listing 3 shows how to draw lines, rectangles, circles (using the ellipse), and ellipses.
清单3显示了如何绘制线、矩形、圆(使用椭圆)及椭圆。
Of course, if I make the total energy positive, it's not an ellipse, so then it's all over.
当然，如果我让总能量,为正，这就不是椭圆了，所以，都可以迎刃而解了。
If this is an ellipse around the Earth, then this would be perigee and this would be apogee.
如果这是一个围绕，地球的椭圆形轨道，那么这是近地点，这是远地点。
The ellipse function also takes four arguments, defining the location and width/height.
ellipse函数也接受四个参数，分别定义位置和宽/高度。
As Kepler showed, the Earth's orbit is an ellipse, with the sun at one of the two focal points.
开普勒曾表明，地球的轨道是一个椭圆，这个椭圆有两个焦点，太阳在其中一个上。
Now I will add a shadow, I will select ellipse tool and I will create a shape below the header.
好了，添加一些阴影。我用的是椭圆工具，在头部下面创建一个细长的形状。
This map, by the way, is the entire sky spread out into an ellipse, known as a Mollweide projection.
（此图，顺便说一句，此图是整个天空展开成椭圆的图——摩尔维特投影（Mollweide projection） 。）
Click on the Ellipse Tool (u) and select the Paths icon in the Options menu (usually at the top of the screen).
点击椭圆工具(U)，并选中选项菜单(通常位于屏幕上部)中的路径图标。
So, you know, if you find that the area is too easy, you can integrate any function other than ellipse, if you prefer.
你们都知道，要求这个面积是非常简单的，如果你们想的话，可以积分除了椭圆函数以外的任何函数。
So, we know that we want to integrate just the area element, let's say, dx dy over the origin inside the ellipse.
我们知道现在要积分面积元素，那就对dxdy积分。
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