如果知道你家里有核武器，他们在破门而入之前肯定会再三考虑。
If somebody knows you have a nuclear weapon in your house, they're going to think twice about breaking in.
从1900年到1950年，改变人类生活的发明有汽车、飞机、电话、收音机、电视机- - -当然还有核武器和计算机。
From 1900 to 1950, the inventions which changed man's life are automobiles, planes, telephone, radio, television and of course, nuclear weapons and computer.
奥巴马宣布美国作为唯一一个曾经使用过原子武器的国家，有责任削减核武器，以使人类在21世纪免遭核武器伤害。
Obama declared that the US, as the only country ever to have used atomic weapons, had a special moral responsibility on nuclear disarmament to make life in the 21st century "free from fear".
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