磁悬浮不依赖于车轮在轨道上的摩擦力。
垂直农业发展出来的一个变化是，在堆叠的、在轨道上移动的托盘上种植植物。
One variation on vertical farming that has been developed is to grow plants in stacked trays that move on rails.
想到一件物品在太空中停留那么久似乎令人惊讶，但目前仍在轨道上的最古老的卫星——先锋1号——在2018已年满60岁。
It might seem surprising to think about an item staying in space for that long, but the oldest satellite still in orbit—Vanguard 1—turned 60 in 2018.
什么是电子在轨道上的排布顺序呢？
对速度做积分,告诉你车在轨道上走的弧长。
And, what it does is it actually integrates the speed of the time to give you the arc length along the trajectory of the car.
卫星在轨道上的寿命从几天到几百年不等。
Satellite lifetimes in orbit range from a matter of days to hundreds of years.
火车在轨道上行驶。
在轨道上，兔子风俗性地承继了居平易近们的长处。
On the orbit, the rabbits habitually inherited the merits of the inhabitants.
我喜欢设想一艘在轨道上运行的艘宇宙飞船如何利用这种现象。
I like to imagine how a spaceship might be able to take advantage of this phenomenon, by orbiting it.
人类的消化系统在轨道上也没什么变化，除了胃里的东西会飘得高一点。
Human digestion works pretty much the same in orbit as well, except that stomach contents float a bit high.
琴：我现在看到他们在轨道上运行，并由架空电力线路供电。
Jean: I I see now that they ride on tracks and are powered by overhead electric lines.
我准备在轨道上滑下，物体，我要求出，绕轨道一周的，震荡时间。
And I'm going to slide down m that track an object mass m, and I'm going to evaluate the oscillation along a perfect circular track.
所有企业都会计专业人士，他们保持在轨道上与他们的预算和支出。
All businesses have Accounting professionals that keep them on track with their budgets and spending.
此外，火星环球探测火星奥德赛和欧空局的火星快车仍然在轨道上。
In addition, Mars Global Surveyer, Mars Odyssey and ESA's Mars Express are still in orbit.
在轨道上运行的卫星总是要飞离地球，而结果总是被地心引力拉回来。
The satellite traveling in the orbit is always escaping from the earth only to be pulled back by gravity.
这种车很安全，在轨道上以每小时60英里速度运行，街道上速度为每小40英里。
Cars would be quite safe running at 60 miles per hour on the track, and 40 miles per hour on the street.
这让很多人推想可能太空里有几十个风干了的动物尸体仍然在轨道上绕行。
This leads many to theorize that perhaps dozens of mummified animals are still making the orbital rounds up there.
因此我们在轨道上的国际空间站里大约有300种不同的食品和饮料可供宇航员选择。
So we have around 300 different foods and beverages in orbit at the ISS that the crew members can choose from.
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。
The point in the orbit nearest the sun is called perihelion, while the point farthest is called aphelion.
一颗新发现的行星在轨道上运动方向上错误，和其宿主恒星的自传反方向。
A newfound planet orbits the wrong way, backward compared to the rotation of its host star.
电子是按其能量递增顺序，排布在轨道上的，首先占满第一级，即最低能级。
Electrons will occupy orbitals in order of ascending energy, occupying the lowest energy first and up.
强健的组织技能，有效的生产习惯和强烈的纪律性是让自己持续保持在轨道上所需要的。
Strong organizational skills, effective productivity habits, and a strong sense of discipline are needed to keep yourself on track.
小丹尼尔现在正在全神贯注的看一个红色的玩具火车在轨道上行使的录像剪辑。
Daniel is now engrossed in watching video clips of a red toy train on a circular track.
无需将废弃的飞行器保持在轨道上，而是在几年的过程中将其拖入大气层引燃。
Instead of keeping the derelict craft in orbit, it will, over the course of a couple of years, drag it into the atmosphere and thus to a fiery end.
然而同时也是地心引力将世界凝聚，使各大行星在轨道上运转，让我们的宇宙井然有序。
But it is also gravity pull that keeps our world together, that keeps the planets in their orbits and our universe in order.
即使是最微小的物体，如果以足够快的速度在轨道上移动，也能成为潜在的致命抛射物。
Even the tiniest pieces move through orbit at speeds fast enough to turn them into potentially deadly projectiles.
探索如何杜邦产品有助于满足现代交通手段的挑战，无论是在轨道上，道路在海上或空中。
Discover how DuPont products contribute to meeting the challenges for modern means of transportation, whether on rails, road, at sea or in the air.
但是他们还说，其它小组的早些观察显示，像木星这样质量的行星很少以这种距离在轨道上运行。
But they say previous observations by other groups suggest that Jupiter-mass planets in such distant orbits are rare.
事发当时，汉寿火车站的铁路工作人员首先注意到了两个女孩在轨道上互相拍照并表演‘一字马’。
Railway personnel at Hanshou Station first caught sight of the two girls taking photos of each other performing splits along the tracks.
事发当时，汉寿火车站的铁路工作人员首先注意到了两个女孩在轨道上互相拍照并表演‘一字马’。
Railway personnel at Hanshou Station first caught sight of the two girls taking photos of each other performing splits along the tracks.
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