In molecular orbital theory, we named orbits based on their symmetry.
在分子轨道理论中，我们基于轨道的对称性给它们命名。
The main axis of the planet's orbital ellipse shifts each time when it goes around the sun.
当行星绕太阳运行时，其轨道椭圆的主轴每次都会改变。
Newton for years had been curious about the cause of the orbital motion of the moon and planets.
多年来，牛顿一直对月球和行星绕轨道运行的原因感到好奇。
Its radio begins to transmit an astonishing amount of information about the satellite's orbital path, the amount of radiation it detects, and the presence of meteorites.
无线电开始传输大量信息，都是关于卫星的轨道路径、探测到的辐射量以及陨石的存在的。
For sometime this theory was considered untestable, largely because there was no sufficiently precise chronology of the ice ages with which the orbital variations could be matched.
有一段时间，这一理论被认为是不可检验的，主要是因为没有足够精确的冰河时代的年表与轨道的变化相匹配。
First, a climate conducive to life on Earth depends upon the extraordinarily narrow orbital parameters that define a continuously habitable zone where water can exist in a liquid state.
首先，地球上适宜生命存在的气候取决于极其狭窄的轨道参数，这些参数定义了一个持续可居住的地带，在那里水可以以液态存在。
As users of London's orbital M25 motorway will know, new roads rapidly fill with more traffic.
走过伦敦外环M25 高速公路的人将会知道，更多的车辆很快就会把新的道路挤满。
We can also figure out the energy of this orbital here, and the energy is equal to the Rydberg constant.
我们还可以在这里计算出该轨道的能量，该能量等于里德堡常数。
So it's an Anti-bonding orbital.
这是一个反键轨道。
有一个sigma轨道。
So that's the idea of a bonding molecular orbital.
这就是成键分子轨道的概念。
Today we're talking about molecular orbital theory.
今天我们要讲的是分子轨道理论。
So that lowered the energy of the molecular orbital.
所以降低了分子轨道的能量。
So this is going to be our molecular orbital diagram.
这就是分子轨道图。
Here is 2s atomic orbital. Here is 1s atomic orbital.
这就是2s原子轨道，这是1s原子轨道。
Does anyone know what the 1, 0, orbital is also called?
有谁知道，1,0,0轨道叫什么吗？
So that leaves each carbon with only one hybrid orbital left.
这样每个碳原子只剩下一个杂化轨道。
And this again is what we're going to call a bonding orbital.
同样，我们叫它成键轨道。
What he didn't want to reveal was that his orbital cortex looks inactive.
但他不愿透露的是，他的眶皮质看起来不活跃。
And it turns out that for a 2 s orbital, that's equal to 6 times a nought.
对于2s轨道，它等于6倍的a0。
So the only way I can get an unpaired is to put it alone in another orbital.
所以获得不成对电子的唯一方法是，把它放在另一个轨道上。
So, molecular orbital theory, on the other hand, is based on quantum mechanics.
另一方面分子轨道理论，是基于量子力学的。
And for a 2 s orbital, you get a graph that's going to look something like this.
对于2s轨道，你们可以得到一个大致是这样的图。
We talked about the wave function for a 2 s orbital, and also for a 3 s orbital.
我们讲过2s轨道的波函数，也讲过3s轨道。
But you should see that there are four radial nodes here since we have a 5 s orbital.
但你们应该知道，这里有4个节点，因为它是5s轨道。
And in the case of the 3 s orbital, that's going to be equal to 11. 5 times a nought.
对于3s轨道，它等于11.5a0。
Any instability or orbital decay can be corrected with thrusters and an onboard engine.
任何的不稳定和轨道衰变都能通过推进器和机载发动机修正。
When you get to the orbital altitude you want, open the door (don't forget your helmet!
当你到达你想要的轨道高度时，打开门（不要忘记你的头盔！）
This is the 1s. And, just to be clear, this is the 1s atomic orbital in atomic hydrogen.
说清楚，这是原子氢的1s原子轨道。
So we would label our anti-bonding orbital higher in energy than our 1 s atomic orbitals.
我们应该把反键轨道标在，高于1s原子轨道能量的地方。
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