First, the weapons should be intended for use only in retaliation after a nuclear attack. Second, the possession of the weapons must be a temporary expedient.

首先，这些武器应当只在遭受核袭击后反击时才使用。其次，这些武器的拥有必须是一种临时的应急手段。

《柯林斯英汉双解大词典》

He added, at this speed, they will be generating more heat per cubic centimeter than a nuclear reactor.

他补充，在这种速度下，每立方厘米产生的热将超过核反应堆。

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The scientist most likely to understand the safety of a nuclear reactor, for example, is a nuclear engineer who declares that a reactor is unsafe.

例如，最有可能理解核反应堆安全性的科学家是宣称反应堆不安全的核工程师。

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"As the only nuclear power to have used a nuclear weapon, the United States has a moral responsibility to act.

VOA: special.2009.04.11

Four times the number of pigs plus two times the number of chickens, assuming they're not next to a nuclear reactor, is 56.

其它还有什么呢？,4倍的猪的数量加上两倍的鸡的数量,考虑到它们不是住在核反应堆旁的。

麻省理工公开课 - 计算机科学及编程导论课程节选

It turns out, and we're going to get the idea of shielding, so it's not going to actually +18 feel that full plus 18, but it'll feel a whole lot more than it will just feel in terms of a hydrogen atom where we only have a nuclear charge of one.

结果是我们会有,屏蔽的想法,所以它不会是完整的，但是它会比原子核电荷量,吸引力要大很多,只有1的氢原子的。

麻省理工公开课 - 化学原理课程节选

Mr Obama and Mr Medvedev met during a nuclear summit in the South Korean capital Seoul.

BBC: Obama and Medvedev caught in unguarded missile remarks

Both say they want to prevent Iran from gaining the technology to build a nuclear bomb.

NPR: Iran's Nuclear Demands Strain U.S.-Russian Ties

Lastly, there is the possibility of a nuclear war triggered by something other than a state.

ECONOMIST: The ostrich��s view of the world