1·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。
2·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。
3·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。
4·If the round blob looks elliptical, that's perhaps due to interaction with the graphite tip that supports the carbon chain, the researchers think.
如果圆球变为椭圆状的，研究者认为那可能是因为支撑碳原子链的石墨与电子间的相互作用。
5·However, if an eclipse occurs while the Moon is on the far side of its elliptical orbit, it appears smaller than the Sun and can't completely cover it.
但是如果日食出现在月球处于它的椭圆轨道远地点的时候，它显得比太阳小而无法完全遮盖住太阳。
1·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。
2·Even in the latter case the line is only elliptical, a form of movement natural to the human body because of the joints, so this hardly demands any great skill from the operator.
即便在后一种情况下，线路也只是椭圆形的，一种对人体来说自然——因为关节——的形式，因此这很难说会对操作者有多高的技艺要求。
3·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。
4·NASA's Galaxy Evolution Explorer found evidence that black holes — once they grow to a critical size — stifle the formation of new stars in elliptical galaxies.
太空总署的星系演变探测者发现了黑洞存在的证据：一旦其达到一个临界规模，椭圆形星系中的新星形成便会被扼杀。
5·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。
1·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。
2·The Moon's elliptical orbit means its distance from the Earth is not constant.
月球椭圆型的轨道意味着它到地球的距离是变化着的。
3·And here you have an explanation of an elliptical motion which is amazingly simple.
关于椭圆型运动的解释，是那么得简单明了。
4·His window is closer to us, and we have a good view of whether he's doing his morning exercises on his elliptical machine, or not.
因为他的窗户和我们的比较靠近，我们能清楚地看到是否在椭圆型的机器上做清晨锻炼。
5·Goat epidermal stem cells were round or elliptical at beginning of in vitro culture with big obvious nucleus, then became colony-like, could grow 14 ~ 20 d.
山羊皮肤干细胞在体外培养开始呈圆形或椭圆型、核大而明显，随后成集落样生长，并可维持14 ~ 20天。