One minute past noon, an unmarked  bomber flies over Manhattan carrying multiple thermonuclear weapons, also known as hydrogen bombs.

中午过后一分钟， 一架没有标记的轰炸机飞越曼哈顿， 携带多枚热核武器，也称为氢弹。

Thermonuclear weapons still use  fission to generate heat and explosive power, but they also employ nuclear fusion, combining smaller  hydrogen atoms under extremely high temperatures.

热核武器仍然利用裂变产生热量和爆炸力，但它们也利用核聚变，在极高的温度下结合较小的氢原子。

The tremendous energy generated by any  thermonuclear weapon comes from a combination of two chemical processes: nuclear fission and  nuclear fusion.

任何热核武器产生的巨大能量都来自两种化学过程的结合：核裂变和核聚变。

Not all  thermonuclear weapons yield as much power as Tsar Bomba, but even lesser bombs, like the United  States B-41, can bring unimaginable destruction.

并非所有热核武器都能产生与沙皇炸弹一样强大的威力，但即使是较小的炸弹， 如美国 B-41， 也能带来难以想象的破坏。

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。