重水之所以重是因为水中氢的重量是普通氢的两倍（它的原子核中有一个质子和一个中子，而不仅仅是一个质子）。
Heavy water is heavy because the hydrogen in it weighs twice as much as ordinary hydrogen (it has a proton and a neutron in its nucleus, instead of just a proton).
说清楚，这是原子氢的1s原子轨道。
This is the 1s. And, just to be clear, this is the 1s atomic orbital in atomic hydrogen.
应该是氢的还是氮的？对，应该是氮的。
Is it going to be hydrogen or nitrogen? Yup, it's going to be nitrogen.
是氢的键更短，还是氮与氮的三键更短？
Is a hydrogen bond shorter, or is a nitrogen-nitrogen triple bond going to be shorter?
氚是氢的放射性形式，有时被称作超重氢。
It is a naturally occurring radioactive form of hydrogen, sometimes known as heavy hydrogen.
氢的优势是其结构非常简单：一个电子环绕一个质子。
The advantage of hydrogen is its unrivalled simplicity: one electron circles a single proton.
最好的核聚变材料有两种，即氢的同位素——氘和氚。
The best fuels for fusion are two types, or isotopes, of hydrogen - deuterium and tritium.
这类白矮星中有着重元素痕迹者，大多也会有氢的痕迹。
Among this group, most of those with traces of heavy elements also have traces of hydrogen.
到那时纯镁可用作燃料(其能量密度大约是氢的十倍)。
The pure magnesium can then be used as a fuel (its energy density is about ten times that of hydrogen).
其中放置了一个更微小的氘(氢的一种同位素)燃料丸。
It contains a tiny pellet of fuel made from an isotope of hydrogen called deuterium.
这是氢的同原子的共价能,在纯氢中，我们有完美的共价键。
This is the homonuclear bond energy for hydrogen in pure hydrogen. There we have perfect covalency.
我们看过原子氢的薛定谔方程，但其实我们能把他用在更复杂的体系。
We saw the Schr?dinger equation for atomic hydrogen, but you can write it for more complex systems.
它有锆或氢的反应速率,它发生的位置，很明显是在同样位置,百分比反应。
It has zirconium/hydrogen reaction rate and where it occurred, obviously about the same place. The percentage reaction.
而分解出氢的效率以重量计算可比其它太阳能热制程的效率高出一个数量级。
The gravimetric hydrogen production rate exceeds that of other solar-driven thermochemical processes by more than an order of magnitude.
一群强大的巨型恒星点燃蔷薇星云的中心，来自电离氢的红光使其绚丽夺目。
The center of the Rosette Nebula, which glows with the red light of ionized hyrdorgen, is fueled by a central cluster of powerful giant stars.
当美国还拥有充足的能生产氢的煤炭和天然气的供应时，有什么理由不喜欢它呢？
As America has abundant supplies of coal and natural gas from which hydrogen can be made, what's not to like about it?
储存氢的另一方法是在燃料箱中放点东西，增加氢分子能够附着的内表面总面积。
Another way to store hydrogen is to put something inside the tank which increases the total internal surface area to which the molecules of the gas can cling.
氘是氢的同位素，在地球上的海洋中广泛存在，其质量较重，很难逃离金星大气。
Deuterium is a heavier form of hydrogen that is common in Earth's oceans and that would have too much mass to escape Venus' atmosphere.
研究人员希望能找到一个类似的基于生物的系统来执行该进程的另一半，氢的生产。
The researchers hope to find a similar biologically based system to perform the other half of the process, the production of hydrogen.
相反他认为大规模生产氢的解决方案在于使用可更新的电通过电解方式从水中提取氢。
Instead, he says, the solution to large-scale hydrogen production lies in using renewable electricity to extract hydrogen from water via electrolysis.
如果我们考虑有六个氢原子，每个都会合起来，碳杂化轨道成键，每个氢的1s轨道。
And if we think about the six hydrogens, now each of those are going to bind by combining one of the carbon hybrid orbitals to a 1 s orbital of hydrogen.
棕矮星是一些由炽热的气体组成的球，它们缺乏像行星那样足够的质量来进行氢的燃烧。
Brown dwarfs are balls of warm gas that lack the mass necessary to fuse hydrogen at their core, as stars can.
这一效率为65%至75%的工序应能足够填补氢空缺，直到生产氢的可再生能源出现。
That process – usually 65 to 75 per cent efficient – should be sufficient to plug the gap until renewable sources of hydrogen become available, he says.
最近，研究者们试图将电磁场以及土壤中氡和氢的含量与将要发生的地震类型联系在一起。
More recently, researchers have sought to associate electromagnetic fields, the radon or hydrogen content of the soil and seismicity patterns with impending earthquakes.
这意味着汽车不直接产生二氧化碳排放，但是否完全零排放取决于用来制造氢的能量原料。
This means the car produces no CO2 emissions directly, but whether it is emission-free overall depends on the source of the energy used to produce the hydrogen.
夏普博士说如果月球岩石中氢的初始含量接近地面的岩石，氯同位素比例比率不会这么分散。
Dr Sharp said that if lunar rocks had initial hydrogen contents anywhere close to those of terrestrial rocks, the chlorine isotope ratios would not have so much scatter.
他们说：这可能造成“提坦”卫星上乙炔的缺失和靠近卫星表面氢的耗尽，那里是微生物生活之处。
This would result in a lack of acetylene on Titan and a depletion of hydrogen close to the moon's surface, where the microbes would live, they said.
虽然廉价的燃料电池及其他转换氢发电的技术已经相当先进，但现在还没有廉价的大量生产氢的方法。
Although cheaper fuel cells and other technology needed to convert hydrogen to power are fairly advanced, there is currently no way to cheaply generate the large quantities of hydrogen needed.
如果应用科学能够解决铜和氢的技术问题，那么它就能够用社会物理学和社会工程学处理好有关人的问题。
The applied science of social physics, social engineering, can deal with man in the same way technology deals with copper and hydrogen.
所以举例来说，如果我们看氩的2s轨道，它有相同数量的节数,和相同类型的节点,对于氢的2s轨道。
So, for example, if we look at the 2 s orbital of argon, it's going to have the same amount of nodes and the same type of nodes that the 2 s orbital for hydrogen has.
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