This meant the Apollo Eight astronauts could fire the rocket that would send them from Earth orbit toward the moon.

VOA: special.2009.07.08

The radius of the orbit, the energy of the system and the velocity of the electron, I am just going to present you the solutions.

是轨道的半径，系统的能量,以及电子的速度，我接下来会给你们讲解其方程的解法。

麻省理工公开课 - 固态化学导论课程节选

So this drops by the square, whereas, you saw how the orbit goes.

这也顺便解释了，你看到的轨道的情况。

麻省理工公开课 - 固态化学导论课程节选

Small changes in the movement of Neptune led several astronomers to believe that an undiscovered planet was affecting Neptune's orbit.

VOA: special.2010.07.11

The subject of white folks is associationally swept into the orbit of talk.

话题中加入了白人。

耶鲁公开课 - 1945年后的美国小说课程节选

Glenn's flight plan called for him to spend most of the first orbit getting used to the feeling of being weightless.

VOA: special.2009.06.17

So, what he did was kind of impose a quantum mechanical model, not a full one, just the idea that those energy levels were quantized on to the classical picture of an atom that has a discreet orbit.

还不是完整的,只是这些能级，是量子化的概念，作用到原子有分立轨道的经典原子模型上,当他做了一些计算后,他得到有个半径,他算出来。

麻省理工公开课 - 化学原理课程节选

Military officials immediately offered to use the Jupiter to put a scientific satellite into orbit around the Earth.

VOA: special.2009.06.10

Let's look first of all at the radius of the orbit.

首先是轨道半径。

麻省理工公开课 - 固态化学导论课程节选

Near the moon, the astronauts fired rockets to slow the spacecraft enough to put it into moon orbit.

VOA: special.2009.07.15

n So the velocity is given by this product of the quantum number n Planck constant 2 pi mass of the electron time the radius of the orbit, which itself is a function of n.

速度是量子数,普朗克常数2π乘以轨道半径的值,它自身也是n的函数。

麻省理工公开课 - 固态化学导论课程节选

The radio waves are measured when the earth is at two points opposite one another in its orbit.

VOA: special.2009.01.20

You see, the quantum condition, by putting quantization into the moangular mentum it is propagated through the entire system. Orbit dimensions are quantized.

你们看，量子条件，通过把,角动量量子化，它就能在这个系统中进行传播,同时轨道大小也被量子化。

麻省理工公开课 - 固态化学导论课程节选

Knowing more about how the Yarkovsky effect changes an asteroid's orbit will help scientists better predict whether RQ36 will come near Earth.

VOA: special.2011.06.22

If de Broglie is correct, we could then model the electron in its orbit not moving as a particle, but let's model it as a wave.

如果德布罗意是对的，那么我们可以在电子轨道中建立电子模型,不是像粒子一样运动，而是像波一样运动。

麻省理工公开课 - 固态化学导论课程节选

Next year, the Chinese plan to launch a small space laboratory to practice docking of spacecraft in orbit.

VOA: special.2010.04.28

Let's imagine this is the electron in its orbit.

想象一下，电子在它的轨道中。

麻省理工公开课 - 固态化学导论课程节选

He would wait in orbit around the moon while Armstrong and Aldrin landed and explored the surface.

VOA: special.2009.07.15

And so, therefore, all other things being equal, the first orbit should be at a smaller distance.

所以，如果别的条件都相同的情况下，第一轨道的距离会更小。

麻省理工公开课 - 固态化学导论课程节选

The twenty-two meter long rocket would put a little scientific satellite into orbit as one of the events of the international geophysical year.

VOA: special.2009.06.10

That is the electron in its lowest orbit, to the nucleus of atomic hydrogen.

那就是氢原子原子核外电子，最低轨道到情况。

麻省理工公开课 - 固态化学导论课程节选

Gemini Six followed Gemini Seven, but in a lower orbit that moved the two spacecraft closer together.

VOA: special.2009.07.01

It is the value of the radius of the ground state electron orbit in atomic hydrogen.

它就代表氢原子基态电子,的轨道半径。

麻省理工公开课 - 固态化学导论课程节选

Iran launched its first satellite into orbit in February -- the thirtieth anniversary of the Islamic revolution.

VOA: special.2009.05.23

It doesn't simply orbit the nucleus, but as it orbits it spins.

它并不只是简单地绕原子核旋转，而是同时进行公转和自旋。

麻省理工公开课 - 固态化学导论课程节选

During the second orbit, one of these signals warned that the heat shield might not be locked firmly to the bottom of the spacecraft.

VOA: special.2009.06.17

And this lowest orbit is termed the ground state.

这个最低轨道被称作基态。

麻省理工公开课 - 固态化学导论课程节选

Because of the gravity on Mars, spacesuits may have to be designed to be lighter than suits used in orbit or on the moon.

VOA: special.2011.04.06

I am going to say if that electron is to stay in its orbit, that is to say it doesn't flee the atom, it doesn't collapse under the nucleus then the sum of the forces on the electron must be zero No net force. And so that will be the sum of a dynamic force plus an electrostatic.

如果电子会保持在它的轨道上运行,既不脱离原子的话，它就不会由于原子核对它的吸引力而被瓦解掉,电子所受的合力一定为零,由于没有合力,所以电子所受力为动态力和静电力的总和。

麻省理工公开课 - 固态化学导论课程节选

The next Royal Astronomer, Edmund Halley, spent another forty years gathering information about the moon's orbit.

VOA: special.2010.07.14