重氢是原子核中多一个中子的氢。
A deuterium atom is a hydrogen with an extra neutron in its nucleus.
控制棒是由能够吸收中子的硼元素制成。
科学家尚未对质子和中子的内部构成形成完整的认识。
Internal composition of protons and neutrons is not examined completely.
同时向堆芯注射可吸收中子的硼酸来作为一种附加的安全措施。
As an added safety measure, they injected neutron-absorbing boric acid into the core.
硼是一种可以吸收中子的元素，中子是一种存在于所有的原子核中的亚原子粒子。
Boron is an element with the ability to absorb neutrons, the sub-atomic particles that occur in the nucleus of all atoms.
在它们的原子核中质子数是相同的(这是一个元素定义性的特征)，但是中子的数量不同。
They have the same number of protons in their nuclei (this is the defining characteristic of an element), but different Numbers of neutrons.
这些控制棒，由能够吸收中子的物质——硼制成，它吸收多余的中子，使链式反应停止。
These rods, made of neutron-absorbing materials such as boron, mop up excess neutrons and quench the chain reaction.
这也预示着，利用氦- 3这种缺少一个中子的稀有的氦同位素进行核聚变的前景很黯淡。
It also bodes ill for the prospect of fusion using helium-3, a rare helium isotope that is missing a neutron.
紧随其后的就是中子的发现，证实了卢瑟福几年前的假设，而之后则是中微子和各种介子被发现。
That was followed closely by the discovery of the neutron, confirming Rutherford's hypothesis of several years earlier, and afterwards the neutrino and various mesons were discovered.
费米气体由量子动力学描述，它被激光阱控制在某处，这使得科学家们能够模拟中子星内致密中子的状态。
The Fermi gas is governed by quantum dynamics and held in place by the laser trap, allowing the group to simulate the conditions of the tightly packed neutrons inside a neutron star.
由于质子与中子的质量大约相等(并且电子几乎没有质量)，氦原子的质量大约应是氢原子质量的四倍。
Because protons and neutrons have roughly the same mass (and electrons have almost no mass), the helium atom should have about four times the mass of the hydrogen atom.
冷却水被泵送到反应堆中心的时候，这些溶解下来的金属离子受到中子的轰炸，导致其中有一部分离子也具有了放射性。
When the water is pumped through the reactor's core, these ions are bombarded by neutrons and some of them become radioactive.
搭载在月球探测器上的中子探测器就发现在特定的地区中子的辐射量减少，而这也许表明月表上可能会有液态水或氢气的存在。
A neutron detector aboard the lunar orbiter found a decrease in neutron radiation that could represent either water or hydrogen in certain areas.
宇宙继续膨胀，当它足够冷下来之后，此时便出现了我们今天看到的基本粒子，质子，中子等，而构成质子和中子的粒子，则是夸克。
As the universe continues to expand, it becomes cool enough to allow the familiar particles of today's matter, protons and neutrons, to form from their constituents, known as quarks.
原子内的一个中子衰变后会产生一个质子、一个电子和一个中微子。
When a neutron inside an atom decays, it produces a proton, an electron, and a neutrino.
这一发现可以帮助我们了解中子星如何从超新星的剧烈爆炸中诞生.
“This discovery helps us understand how neutron stars are born in violent supernova explosions,” astrophysicist Craig Heinke of the University of Alberta said in a press release.
聚变后形成氦以及一种称为“中子”的亚原子粒子。
They would form helium and a subatomic particle, called a neutron.
该裂变过程会利用直线加速器质子束产生的中子加以控制。
The fission process would be controlled using neutrons produced by a linear accelerator's proton beam.
科学家发现的其他中子星均要比这颗更老。
Every other neutron star identified by scientists has been much older.
同样地，质子和中子也应该有对应的反粒子。
In the same way the proton and neutron should also have their corresponding antiparticles.
脉冲星是已经死亡的小型中子星，直径只有20公里(12.4英里)左右，每秒旋转数百次，同时还会向外发出无线电光束。
Pulsars are tiny, dead neutron stars that are only around 20 kilometers (12.4 miles) in diameter and spin hundreds of times a second, emitting beam of radiation.
每个原子团簇是由中子和质子组成的。
在一个原子的核内，中子和质子聚合在一起。
Neutrons and protons are bound together in the nucleus of an atom.
中子携带的能量可转化为热能。
The neutron would carry energy that could be converted into heat.
同样，这种效应无法永远持续下去，因为否则Cas a将远比普通中子星的温度低。
Likewise, it can't go on forever because Cas a would get far colder than neutron stars generally do.
在核反应堆中，保持合理数量的中子存在至关重要。
In a nuclear reactor, it is essential that just the right number of neutrons are present.
如今，全美每个主要医疗中心均具备产生X光、质子、中子或重离子的加速器。
Today, accelerators producing X-rays, protons, neutrons or heavy ions can be found at every major medical center in the U.S..
反中子逃离大气，然后在高得多的区域衰变为反质子。
The antineutrons escape the atmosphere and then decay into antiprotons at much higher altitudes.
反中子逃离大气，然后在高得多的区域衰变为反质子。
The antineutrons escape the atmosphere and then decay into antiprotons at much higher altitudes.
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