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。
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？
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。
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。
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。
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。
And it shifts its orbit from being roughly circular to more elliptical on a 100,000-year cycle.
并且它的变轨周期是10万年，从近似的圆变得更椭圆。
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。
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。
Mainly strength training, bicycling, elliptical training, yoga, stairclimbing, pool running, rowing, and walking.
主要是力量训练，骑自行车，椭圆训练，练瑜伽，爬楼梯，池中跑步，划船，竞走。
Eventually, the elliptical galaxies should merge, creating one single super-galaxy many times larger than our Milky Way.
最终，椭圆星系将融合，创造出一个比我们银河系大很多倍的超级星系。
The universe's largest known galaxies are giant elliptical galaxies, which may be as much as two million light-years long.
宇宙中已知的最大的星系是巨椭圆星系，可能长2百万光年。
Its broad arms are distorted by gravitational interaction with a fellow Virgo cluster member, giant elliptical galaxy NGC 4697.
其宽广的旋臂被该星系团另一成员，巨型椭圆星系ngc 4697的引力作用所扭曲。
The dwarfs' orbits tend to be very different, too — much more elliptical and more inclined, relative to the plane of the solar system.
这颗矮行星的轨道看起来也十分与众不同——和太阳系的标准比起来，更显椭圆形，也更加倾斜。
Common shapes in fire include teardrops and tendrils for the flames and an elliptical shape for the entire space taken up by the fire.
一般火焰的形状包括火苗呈现的水滴状和卷须状，还有整个火焰呈现出来的椭圆形。
Cycling, water running, cross country skiing and using an elliptical trainer burn decent amounts of calories without the pounding of running.
骑车、水中跑步、越野滑雪以及椭圆机都可以消耗热量而不用跑步。
The behavior of a galaxy's dark matter halo could affect its evolution and help determine whether it becomes a spiral or an elliptical, they added.
科学家们补充说，星系的暗物质晕可能会影响到星系自身的演化过程并决定星系的形态——椭圆状或者是涡旋状。
Some spiral galaxies like our own, others elliptical in shape more like rugby balls and others just loose clumps of stars with no real defined shape.
有的漩涡星系长得和银河很像，有的星系则呈橄榄球般的椭圆形，还有的只是群星松散的排列，没有鲜明的形态。
Some spiral galaxies like our own, others elliptical in shape more like rugby balls and others just loose clumps of stars with no real defined shape.
有的漩涡星系长得和银河很像，有的星系则呈橄榄球般的椭圆形，还有的只是群星松散的排列，没有鲜明的形态。
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