Sometimes it is a little more circular, sometimes it is more elliptical.
有时它更圆一点，有时它更像椭圆。
When Earth's orbit is more elliptical, Earth is actually closer to the sun during part of the year.
当地球的轨道更接近椭圆时，地球实际上在一年的一部分时间里更接近太阳。
Astronomers suspect that pairs of planets also engage in this slingshot activity, leaving them in disturbed, elliptical orbits.
天文学家怀疑成对的行星也参与了这种弹弓活动，使它们处于不规则的椭圆轨道上。
Under the control of the Sun's gravitational force, each planet maintains an elliptical orbit and all of them travel in the same direction.
在太阳引力的控制下，每个行星都维持在一条椭圆形的轨道上，并按照相同的方向移动。
Comets formed in circular orbits but were gravitationally flung into their present-day elliptical orbits when they ventured too close to planets.
彗星在圆形轨道上形成，但当它们冒险太接近行星时，就会被引力抛入现在的椭圆轨道。
But elliptical galaxies seem to be simpler.
但椭圆星系似乎更简单。
Elliptical galaxies are shaped as their name suggests.
椭圆星系的形状正如它们的名字所述。
It doesn't just have to be working the elliptical at the gym.
这不只是在椭圆形的健身房里运动。
Will the result of these galactic collisions be one big elliptical galaxy?
星系的撞击将会使它们合成一个大的椭圆型星系吗？
Now use the Elliptical Marquee Tool and create a circular selection as shown.
现在使用椭圆选框工具创建一个圆形选区，如下图。
Its huge elliptical form is enveloped in a dense latticework of steel columns.
它的巨大的椭圆形的形状由密集的由钢铁组成的格子所包裹。
Today, I will talk to you about elliptical orbits and Kepler's famous laws.
今天我们要讨论，行星轨道，和著名的开普勒定律。
To select the outer circle, create an elliptical selection around the circle.
要创建其外圆，要创建一个近似正圆的椭圆。
Select the Elliptical Marquee Tool (m) and make a selection over the divider line.
选择椭圆选框工具(M)然后在分割线上面画出一个椭圆。
Newton also proved incidentally that a vortex could not generate elliptical motion.
牛顿也证明了漩涡能产生椭圆运动纯属偶然。
Create the nodes we'll see on our diagram (rectangular shape and elliptical shape).
创建图表中显示的节点(矩形和椭圆形)。
He thinks up ideas while working out on the elliptical machine or brushing his teeth.
他在椭圆机上锻炼或刷牙时思考点子。
This is because of the Moon's orbit around Earth which is oval or elliptical in shape.
这是因为月球环绕地球的轨道是卵形的或者椭圆形的。
Elliptical galaxies do not take on the flat-disk or spiral shapes that most galaxies do.
椭圆星系并不具有大多数星系具有的扁圆或是螺旋型的形状。
If your knees bother you, choose a stationary bike, an elliptical machine, or go for a swim.
如果你的膝盖不好，那你可以选择一辆健身自行车、一个椭圆机，或者去游泳。
Spanning roughly 5 kilometers (3 miles), Goat Paddock Crater has a slightly elliptical shape.
山羊围场陨石坑略呈椭圆形，直径约5公里(3英里)。
The Moon's orbit is elliptical, meaning it does not follow a circular but rather an oval path.
月球的轨道是椭圆的，因此，就意味着它不是以正圆的方式环绕地球公转，而是椭圆。
Many of them have elliptical plots and are sprinkled with spelling and grammatical errors.
有些故事的情节晦涩难懂，还有少量拼写和语法错误。
Elliptical galaxies may also be small, in which case they are dubbed dwarf elliptical galaxies.
椭圆星系也可能很小，在这种情况下它们被称为矮椭圆星系。
Unlike the elliptical galaxies, the spiral is rich in dust and gas for the formation of new stars.
与椭圆型星系不同，漩涡型星系含有丰富的尘埃和气体，这些都是形成新的恒星的原料。
Just below and to its right is fuzzy-looking Maffei 1, the closest giant elliptical galaxy to Earth.
它的下面偏右（在画面的左边中间）看起来毛绒绒一团的是马费伊1，离地球最近的巨型椭圆星系。
Later in the course, we will cover elliptical orbits, but now let's exclusively talk about circular orbits.
我们在之后的课程还会讲到椭圆轨道，不过现在我们只讲，圆轨道。
Galaxies are classified into three main types: spiral galaxies, elliptical galaxies, and irregular galaxies.
星系主要分为三类：螺旋星系、椭圆星系和不规则星系。
Select the elliptical Marquee Tool, and then make an elliptical selection at the bottom of your welcome image.
选择椭圆选框工具，然后在欢迎图片下方画一个椭圆。
I now go into an elliptical orbit because the new velocity is no longer the right velocity for a circular orbit.
我现在要进入一个椭圆形轨道，因为新的速度已经，不是圆形轨道中的速度。
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