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。
如果中子的变动率是0，那就是它了。
中子的速度越快，它所击破的原子就越少。
核爆炸中子的减弱包括几种不同的现象。
The attenuation of neutrons from a nuclear explosion involves several different phenomena .
中子的逸漏发生于铀(或钚)块的外表面。
The escape of neutrons occurs at the exterior of the uranium (or plutonium) material.
中子的逸漏发生于铀（或钚）块的外表面。
The escape of neutrons occurs at the exterior of the uranium(or plutonium )material.
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.
现在，K有效能够相对直接地定义，由中子的产生除以损耗。
Now K effective can be defined relatively straight forwardly by production of neutrons divided by losses.
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.
所以，当我们想要知道中子的变动率，那是时间方程，我们会写下这个表达式。
So if we wanna know the rate of change of neutrons as a function of time we will write this expression.
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.
这是因为他们将完成与质子和中子的融合，而其融合采取方式是让核反应更容易快捷地发生。
This is because they would have combined with protons and neutrons in ways that made it easier and faster for other nuclear reactions to occur.
我们需要知道中子的速率，我们能够用能量来谈论它，我们需要知道时间，它什么时候会发生？
We need to know the velocity of the neutron which we can talk about with energy and we need to know the time, when did this take place?
最流行的聚变做法是将两个氘原子结合在一起——氘是带有一个额外的中子的重氢。
Most current fusion efforts look to combine two atoms of deuterium, a heavier version of hydrogen with an extra neutron.
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.
但它也将成为第一个能够测点定位足够多微中子的望远镜，使之值得用于测量地球内部。
But it will also be the first telescope capable of spotting enough neutrinos to make it worthwhile to take measurements of the interior of the Earth.
但是空气中的氮气中的氮原子却会被一个叫做同位素的有着不同数量中子的氮原子所替换。
But the nitrogen in the air was replaced with a nitrogen atom with a different number of neutrons, called an isotope.
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.
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.
核反应可以通过使用由吸附中子的材料构成的棒条，比如硼，来减慢裂变过程，从而控制其反应。
The nuclear reaction can be controlled utilizing rods made of neutron-absorbing material, such as boron, essentially shutting down the fission process.
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.
在通常的全动力应用下，内核里中子的产量是稳定的（保持一个数量不变），反应器处于临界状态。
During normal, full-power operation, the neutron population in a core is stable (remains the same) and the reactor is in a critical state.
如果我们在这开始，生产的快速中子,通过裂变，通过热能裂变,你加入生产的快速,中子的全部数量。
So if we start up here, fast neutrons produced by fission, by thermal fission and then you add the total number of fast neutrons produced.
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.
或者它有能够创造出一个裂变中子的碰撞,那能够追踪到一个裂变的开始,那可能是在一个很不同的位置。
Or it can have a collision that can create a fission neutron which then is tracked as well as the start of a fission which may be in a quite different place.
大约80百分之的聚变能以中子的形式释放出来，所以这个核反应不是很大（或有用）对于一个星际飞船。
About 80 percent of the fusion energy released is in the form of those neutrons, so the reaction isn't very healthy (or useful) for a starship.
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.
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.
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