He says there are more than three hundred thousand small objects or pieces of debris in orbit that are larger than one centimeter.

VOA: special.2009.04.01

Well, suppose I want to look at something like an electron in orbit here.

假如我想看到,轨道上像电子一样的东西。

麻省理工公开课 - 固态化学导论课程节选

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

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

VOA: special.2009.07.15

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

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

Well, this is in a stationary orbit so we need to have a standing wave. Not to scale.

在静止的轨道中,我们需要的是驻波，不是要去测量。

麻省理工公开课 - 固态化学导论课程节选

And they broadcast, for the first time, live television pictures of men in orbit.

VOA: special.2009.07.08

In order to have an electron in a stationary orbit this implies standing wave.

为了在静止的轨道中拥有电子,驻波是不可少的。

麻省理工公开课 - 固态化学导论课程节选

Before the collision, Iridium had a group of sixty-six satellites in orbit.

VOA: special.2009.04.01

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

John Glenn was in orbit one hundred sixty kilometers above the Earth.

VOA: special.2009.06.17

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

Schirra and Stafford proved that spaceships could link up while in orbit.

VOA: special.2009.07.01

You've got negative charge in motion, and it's in a circular orbit.

负电荷在运动，它们处在一个环形的轨道中。

麻省理工公开课 - 固态化学导论课程节选

By the third day in orbit, all was normal again.

VOA: special.2009.06.24

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

And next year, the country is launching a small space lab to practice docking in orbit - an essential part of manned missions to the Moon and Mars.

VOA: standard.2010.04.21

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

VOA: special.2009.01.20

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

VOA: special.2009.07.01

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

VOA: special.2009.05.23

The timing would put the two spacecraft in the correct orbit to meet in space.

VOA: special.2009.07.01

Schirra fired a rocket exactly long enough to put his spacecraft in the same orbit.

VOA: special.2009.07.01

And he says five of the planetary candidates are both close to the size of Earth and orbit in the habitable area of their parent stars.

VOA: special.2011.02.09

In nineteen fifty-seven, a Soviet military rocket carried a small satellite into Earth orbit.

VOA: special.2009.06.10

And they placed a small satellite in lunar orbit before they returned to Earth.

VOA: special.2009.07.29

The number of man-made objects in Earth orbit has been growing each year.

VOA: special.2009.04.01

The Hubble Space Telescope was launched into orbit in April of nineteen ninety.

VOA: special.2009.09.30

We think of the telescope as moving slowly in its orbit.

VOA: special.2009.09.30