This is an active nuclear reactor, and down there are uranium fuel rods undergoing fission reactions.

这是一个活跃的核反应堆，下面是正在进行裂变反应的铀燃料棒。

Scientists used this to control the fission reaction and harness its power, and this changed the world forever.

科学家们用它来控制裂变反应并利用其能量，这永远地改变了世界。

Scientists are still trying to understand fusion well enough to harness that energy like they do with fission reactions.

科学家们仍在努力深入了解核聚变，以便像利用裂变反应那样利用这种能量。

That day he was showing seven colleagues a fission reaction.

那天他正在向七位同事展示裂变反应。

Both fusion and fission reactions ultimately end up at iron.

裂变反应最终都变成了。

Now the other sticky wicket of fission reactions is the stuff that's left behind.

现在裂变反应的另一个粘性检票口是留下的东西。

If the nucleus is heavier than iron-56 it will tend to break into two or more smaller nuclei; a fission reaction.

如果原子核比铁 56 重， 它将倾向于分裂成两个或更多更小的原子核； 裂变反应。

At the moment of detonation, a primary fission reaction causes temperatures inside the bomb  to skyrocket to over 100 million degrees.

爆炸瞬间，初级裂变反应导致炸弹内部温度飙升至超过 1 亿度。

That means their reactions release far more energy than fission reactions do, so much more that it's nearly impossible to contain and therefore use.

这意味着它们的反应释放的能量比裂变反应释放的能量多得多，以至于几乎不可能容纳和使用。

Fission reactions release energy by splitting atoms, basically, neutrons it kicked out of the nucleus of an unstable atom hit another nuclei setting off a chain reaction that releases lots of heat and X-Rays.

裂变反应通过分裂原子释放能量，基本上，它从不稳定原子的原子核中射出的中子撞击另一个原子核， 引发连锁反应， 释放大量热量和 X 射线。

And it's surrounded by high explosives, and it has to be enough high explosives to drive that material and compress that material small enough and fast enough and to a high enough density to create those fission reactions.

它被烈性炸药包围，并且必须有足够的烈性炸药来驱动该材料并将该材料压缩得足够小、足够快并达到足够高的密度以产生裂变反应。

I'm not going to get into too much detail about this for obvious reasons, but one of the most space efficient designs is a thermonuclear weapon; one that uses a fission reaction and then triggers a secondary fusion reaction.

出于明显的原因， 我不会对此进行过多的详细介绍，但最节省空间的设计之一是热核武器； 一种使用裂变反应然后触发二次聚变反应。