The United States now has about 2, 200 nuclear warheads and the Russians 2, 800.

美国现在有大约2200枚核弹，而俄罗斯为2800枚。

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Scientists now propose a more modest system, aimed at insects rather than nuclear warheads.

如今科学家提出了一个更加切实可行的系统，用于杀灭昆虫，而非摧毁核弹头。

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Only two countries on Earth possess thousands of nuclear warheads: the United States and Russia.

世界上拥有数千枚核弹头的国家只有两个：美国和俄罗斯。

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In July,President Barak Obama and his Russian counterpart Dmitry Medvedev agreed to reduce their respective numbers of nuclear warheads to between 1,500 and 1,675 under a new treaty.

VOA: standard.2010.02.03

The Obama Administration says it will not be conducting underground nuclear tests or developing new nuclear warheads, because it does not want a repetition of what happened in Hiroshima and Nagasaki.

VOA: standard.2010.08.06

It expired last December. After a year of tough negotiations, Mr.Obama and Mr.Medvedev will sign a treaty to shrink each country's arsenal of strategic deployed nuclear warheads by 25 to 30 percent.

VOA: standard.2010.04.04

Some American experts say India has around 60 nuclear warheads and Pakistan about 40.

ECONOMIST: South Asia’s nuclear winter | The

The atomic scientists estimate that India has about 30-35 nuclear warheads, which is fewer than Pakistan.

ECONOMIST: South Asia’s nuclear winter | The

The collapse of the Soviet Union left 3, 400 nuclear warheads in Ukraine, Kazakhstan and Belarus.

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