水分子由两个氢原子和一个氧原子构成。
A molecule of water consists of two atoms of hydrogen and one atom of oxygen.
两个氢原子和一个氧原子结合组成一个水分子。
Two atoms of hydrogen combine with one atom of oxygen to form a molecule of water.
太空中平均每立方厘米只有两个氢原子，这对低速飞行的宇宙飞船不构成威胁。
There are just two hydrogen atoms per cubic centimeter on average in space, which poses no threat to spaceships traveling at low speeds.
在19世纪50年代的头几年，阿姆斯特朗，那时还在瑞典的乌普萨拉大学里，做了一个有关氢原子的实验。
In the early years of the 1850s, Armstrong, still at uppsala university in Sweden, conducted an experiment with hydrogen atoms.
在水中大多数氢原子和氧原子是稳定的，但这两个元素也有微量以较重的同位素形式存在。
Most hydrogen and oxygen atoms in water are stable, but traces of both elements are also present as heavier isotopes.
和乙醇一样，丁醇也属于醇类，这说明每一个丁醇分子包括一个氧原子和直链烷烃里的那种碳原子、氢原子。
Like ethanol, butanol is an alcohol. That means each of its molecules contains an oxygen atom as well as the carbon and hydrogen found in an alkane.
然后我们从氢原子那得到了两个电子。
本质上，它只能允许我们,和两个氢原子成键。
Essentially it would only allow for us to bond to two hydrogen atoms.
现在这是两个分别独立的氢原子。
天然气的主要成分是甲烷，它含有一个碳原子和四个氢原子，这项转化的关键是把一个甲烷分子变大。
The challenge is to take a molecule of methane, the main component of natural gas consisting of one carbon atom and four hydrogen atoms, and turn it into something bigger.
这一切都发生在一个俘获反氢原子的磁瓶里。
All this happened inside a magnetic bottle that traps the antihydrogen atoms.
催化剂会把水分解成氧气和氢原子的构成部分：一个质子和一个电子。
Which splits water into oxygen and the constituents of hydrogen, a proton and electron.
那么氢原子是不可避免的地雷吗？能不能有一个真正的柯克舰长每时每刻吃掉无限多的辐射能来驱动翘曲引擎？
So are hydrogen atoms unavoidable space mines? Would a real-life Capt. Kirk eat an infinite amount of radiation every time someone engaged the warp drive?
临界密度的值非常小：它相当于每立方米约6个氢原子，从地球上的标准来看这简直是真空！
The value of the critical density is very small: it corresponds to roughly 6 hydrogen atoms per cubic meter, an astonishingly good vacuum by terrestrial standards!
对于不同原子在分子中的位置，如果你有一个氢原子或者一个氟原子，那你基本可以保证，它们总是最末端的原子。
In terms of where different atoms are in a molecule, if you have a hydrogen atom or a fluorine atom, you can pretty much guarantee they're always going to be terminal atoms.
与其他恒星一样，太阳也是一个巨大的“气球”——大部分主要为氢原子和氦原子。
Like other stars, the sun is a big ball of gases — mostly hydrogen and helium atoms.
我们创造出一个强大的‘磁瓶’，并在其周围产生反氢原子，如果它们的移动速度不是很快，便会被捕获。
We build a strong 'magnetic bottle' around where we producethe antihydrogen and, if they're not moving too quickly, they aretrapped, " he told BBC News.
脂肪酸和醇类很相似，它有着大量的氢原子和碳原子，以及数量很少的氧原子(它还有两个氧原子而非一个)。
Like alcohols, fatty acids are molecules that have lots of hydrogen and carbon atoms, and a small amount of oxygen (in their case two oxygen atoms, rather than one).
在半重水的水分子中，一个氢原子（H）被一个称之为氘（D）的氢原子的同位素所取代。
In a semiheavy water molecule, one hydrogen atom (H) is replaced with a heftier version called deuterium (D).
这是从教科书上复制下来的图表，这里有两个电极进来，这是气体管中的氢原子。
This is the diagram taken right from your text, there are the two electrodes coming in and this is atomic hydrogen in the gas tube.
当我们增大两个电极之间电压,我们有-我们可以把氢气2,分解成单个的氢原子，不仅这样，还能激发原子。
When we increase the potential between the 2 electrodes that we have in the tube -- we actually split the h 2 into the individual hydrogen atoms, and not only do that, but also excite the atoms.
每个氢原子都有两个电子，这是一个令人满意的体系。
And so, each hydrogen has access to each electron, and now we have a satisfied system.
甲基是有机化学的基本单位：一个碳原子连接三个氢原子。
A methyl group is a basic unit in organic chemistry: one carbon atom attached to three hydrogen atoms.
事实上，它在肝脏中与四个氢原子结合后转化成叶酸。
In fact, it is converted to folate in the liver by the addition of four hydrogen atoms.
催化剂会把水分解成氧气和氢原子的构成部分：一个质子和一个电子。
Which splits waterinto oxygen and the constituents of hydrogen, a proton and electron.
塑料中的碳原子呈饱和态，与两个氢原子相结合。
The carbon atoms in the plastic are saturated, having bonded with two hydrogen atoms.
现在我们这有一个氢原子。
我们可以加三个氢原子到这里，填满其它的轨道。
So we can add three hydrogen atoms here, and fill in our other orbitals right here.
当我们看一个薛定谔方程的时候，它给出一个稳定的氢原子，这是在经典力学中做不到的。
Also, when we're looking at the Schrodinger equation, it allows us to explain a stable hydrogen atom, which is something that classical mechanics did not allow us to do.
那么，我们看到两个分开的氢原子所具有的能量,比原子中没有电子时更低。
So, we see that the two h atoms separate have a certain energy that's lower than when the electron's not with the atom.
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