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。
Here's the pneumonic I mentioned for writing the electron configuration and getting those orbital energies in the right order.
这是我提到的肺，用于写电子构型，并以正确的顺序得到轨道能量。
What is a space vehicle launching entity required to do according to the current Government Orbital Debris Mitigation Standard Practices?
根据现行的政府轨道碎片缓减标准做法，航天器发射实体需要做什么？
The goal was to measure the AU; then, knowing the orbital speeds of all the other planets around the Sun, the scale of the Solar System would fall into place.
目标是测量AU；随后，当我们知道了所有围绕太阳的其他行星的轨道速度，对太阳系的规模就有充分的认识了。
The disk exerts its own gravitational tug, and this interplay of forces robs the planet of momentum in its orbital path, forcing it to spiral in toward the star.
圆盘产生自己的引力拖曳，这种相互作用的力夺走了行 星在其轨道上的动量，迫使它盘旋向恒星的方向。
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。
The newly discovered world followed an orbital path unlike that of any other planet.
新发现的这个天体的运行轨和任何其他行星的不同。
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。
Recall the molecular orbital diagrams we created for diatomics back.
回想一下我们为双原子创建的分子轨道图。
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。
OK. So we can have this orbital here.
．OK，所以我们有这个轨道。
What, in this case, would be our orbital?
在这种情况下轨道是什么？
It is not dependent on the actual orbital.
它不依赖于轨道。
So this is what we call our molecular orbital.
这就是我们所说的分子轨道。
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, let's start our discussion of a bonding orbital.
让我们开始来讨论成键轨道。
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。
And I cannot have an unpaired electron in the same orbital.
我不可能在同一个轨道，得到不成对电子。
What is the orbital period of the sandwich after the throw?
被扔的三明治的，轨道周期是多少？
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。
So any time you see a star that means an anti-bonding orbital.
任何时候你看到有个星，这意味着它是反键轨道。
Amazingly beautiful gas sphere photographed orbital telescope Hubble.
由轨道哈勃望远镜拍摄的令人惊异的美丽的气泡。
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