If we look at a star in January—when Earth is at one point in its orbit—it will seem to be in a different position from where it appears six months later.
如果我们在一月份观察一颗恒星——那时地球在其轨道上的一个点——它的位置似乎会与六个月后它出现的位置不同。
The cable would connect with some point on Earth located at the equator, and would allow mass to be transferred to orbit using electricity instead of rocket fuel.
该电缆将连接一些位于地球赤道上的点，这将允许群众被运送到到轨道使用电来代替火箭燃料。
It has reached the point where this oval orbit is nearest to the Earth.
最近，月球到达了离地最近的椭圆轨道点上。
As a result it appeared some 14 percent larger and 30 percent brighter than a Full Moon near apogee, the most distant point in the elliptical lunar orbit.
结果，这导致了比起运行到远地点(椭圆形月球轨道的最远端)时的满月，那天的月亮面积增大14%，亮度增加30%。
Rising on March 19, its exact full phase occurred within an hour of perigee, the closest point in the Moon's orbit to Earth.
3月19日那天的月亮，它最圆的相位发生在月球运行到近地点(月球轨道距离地球最近)附近一个小时以内的时间内。
One will carry the crew into space, while the other will lift their equipment and supplies to a rendezvous point in orbit.
其中一个搭载机组成员进入太空，另一个将携带他们的仪器和给养至轨道中的交汇点。
Their explanation: a faint, far-off companion star to the Sun was sending down a rain of comets when it reached just the right point in its orbit.
他们的解释是这样的：遥远的地方，太阳有一颗微弱的伴星，当它到达轨道的某个定点时，就会产生大量彗星。
This orbit (a high Earth or geosynchronous orbit) means that the satellite will always be directly over the same point on Earth, ensuring a continuous view of the ground.
这条轨道(高地同步轨道)意味着这些卫星总是位于地球上的某点之上，保证对地的持续观察。
Stars orbit the pivot point at the center of galaxies, planets in turn orbit stars, and moons in turn orbit planets.
恒星围绕着星系轴心转，行星围绕着恒星转，卫星围绕着行星转。
The point in the orbit nearest the sun is called perihelion, while the point farthest is called aphelion.
在轨道上最接近太阳的点被称为近日点，而最远离太阳的点被称为远日点。
Many, though, form a ring like Saturn's at a distance of 36,000km, the place at which an object takes 24 hours to orbit the Earth and thus hovers continuously over the same point of the planet.
尽管，许多卫星在36000千米处形成一个类似土星光环的环，但这个高度的卫星都需要花费24小时绕地球一圈。因此，它们一直在地球上空的同一点盘旋。
The important point about Falcon 9, so called because its lift-off is propelled by nine of SpaceX's proprietary Merlin rocket motors, is that it is powerful enough to put people into orbit.
称为“猎鹰九号”，是因为它的升空推进力来自于九架由太空探索技术公司自行研发的“莫林”火箭发动机。重点在于这架火箭拥有足够的动力把人送入太空轨道。
Periapsis in earth orbit; the point in its orbit where a satellite is nearest to the earth.
以地球为中心的最近点；人造卫星轨道上离地球中心最近的点。
From the point of view of the SH-7 module, this resulted in the BX-1 appearing to orbit around the module with between four and eight kilometers of separation.
从神七来看，这点不同造成了BX - 1出现在轨道舱4到8公里距离的轨道上。
Apoapsis in earth orbit; the point in its orbit where a satellite is at the greatest distance from the earth.
以地球为中心的最远点；人造卫星轨道上离地球中心最远的点。
The idea of point defense goes back to before most species even had the ability to orbit their planets, much less the formation of a galaxy spanning civilization.
点防御理念可以追溯到很久以前，那时大多数种族甚至还不具备环行星轨道飞行的能力，更不必说建立银河文明了。
Saturday night (Jan. 10) the moon will be at perigee, the closest point to us on this orbit.
星期六晚上（1月10日），月亮将会达到近地点，轨道上离我们最近的一点。
This is the point in the sky where we cross the comet's orbit, kind of like the point in the distance where train tracks converge.
这个点就是我们地球上空和彗星的交叉点，有点类似远距离的火车站一点集合。
Use static elements or relative static elements in the changing graph to get the main moving point and its relations with other known conditions to correctly calculate the orbit equation.
利用变动图形吕的静止或相对静止因素，抓住主要动点及其与已知条件的联系，正确求出轨迹方程。
It is shown that if a generalized symmetric system is controllable on a neighborhood of a point, then the system is controllable on some open set which includes the group action-orbit at the point.
文中证明了如果广义对称系统在一点的邻域可控，那么系统在包含该点群作用轨道的一个开集上是可控的。
The lowest point (perigee) of the ISS was 347 kilometers and the highest point (apogee) of the SH-7 orbit was 336 kilometers.
国际空间站的最低点(近地点)是347公里，神舟七号的最高点(远地点)为336公里。
They are relative motion orbit simulation system for point target, MDIS simulation system for point target, and MDIS simulation system for general image sequences which include background scene.
最后，实现了点目标相对运动轨迹仿真系统，点目标电子稳像仿真系统和存在背景图像的电子稳像系统三个仿真演示系统。
Expatiated on the application theory of basic orbit, including subastral point calculation, visibility analysis, coverage evaluating and spacecraft life-span estimate.
阐述了基本轨道应用分析理论，包括星下点轨迹计算、可见性分析、覆盖评估和轨道寿命估算。
Ironically, it was another discrepancy in a planet's orbit that helped to point out flaws in Newton's theory.
具有讽刺意味的是另一个差异在地球的轨道，有助于指出缺点牛顿的理论。
Meteors in annual showers stem from comets, and the radiant point is the point in the sky where we cross the comet's orbit. It's kind of like the point in the distance where train tracks converge.
每年的流星雨主要来自彗星，而辐射点就是与彗星轨道相交的那个点，就好像列车轨道在远处聚合的那点一样。
It is proven that if the systems with symmetries can be decomposed at a point, then it can be decomposed at all the points in the orbit of this point.
特别是若状态流形是齐次流形的话，则由系统在某一点可能控分解就能推出系统可全局能控分解。
The stabilization of an unstable periodic orbit in a neighborhood of an unstable fixed point is studied.
讨论了不稳定不动点邻域的不稳定轨道的稳定问题。
Purpose To analyse the characteristics of mandibular incisor point chewing movement on frontal plane orbit in youth of normal occlusion.
目的分析正常(牙合)青少年下颌切点额状面咀嚼运动轨迹的特征。
Purpose To analyse the characteristics of mandibular incisor point chewing movement on frontal plane orbit in youth of normal occlusion.
目的分析正常(牙合)青少年下颌切点额状面咀嚼运动轨迹的特征。
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