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1·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》

2·It would not prove worthwhile to instigate a nuclear attack.

挑起核攻击最终是不值得的。

3·Do you keep a jumbo-size candy bar in your desk drawer in the event of a nuclear attack?

你的抽屉里随时都有一条巨无霸糖果棒以防核弹来袭吗？

4·President Barack Obama told delegates Tuesday that the risk of a nuclear attack has risen.

奥巴马对星期二前来的代表们说，核袭击的风险已经在上升。

5·In 1983, for instance, a Soviet early-warning system detected an incoming American nuclear attack.

例如，1983年，苏联的早期预警系统检测到美国即将进行核攻击。

6·In the event of a nuclear attack, we'd be back up and running in all non-irradiated areas very quickly.

一旦发生核袭击，其他未受辐射地区的银行可以迅速备份并继续运行。

7·Japan's status as the only target of nuclear attack, in Hiroshima and Nagasaki in 1945, adds to the public's sensitivity.

1945年在广岛和长崎，日本作为唯一遭受核弹攻击的国家这一状况，更增添了公众对于核的敏感。

8·The probability of nuclear attack in some major cities is not very great in a subjective sense, but it is by no means zero.

从主观上讲，今后发生核打击的可能性不太大，但也不是完全没有。

9·In 2006, his colleague Matthew Bunn created a mathematical model predicting a 29 percent probability of a nuclear attack in the next 10 years.

2006年，他的同事马修·邦恩创建了一个数学模型，以此预测出未来10年核攻击概率为29%。

10·Sagan makes the point that the most dangerous collision facing us now, however, is one that might be mistaken for something else: a nuclear attack.

萨根阐述的观点是目前我们面临的最危险的是碰撞而非人们误解的核战。