It is used to monitor the us nuclear stockpile, as well as conduct research into astronomy, genomics and climate change.

用于监测美国核储备，同时也用于天文、基因组和气候变化的研究。

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Britain's nuclear stockpile has shrunk over the years and will now be reduced from "fewer than 200" to "fewer than 160" warheads.

英国核武库多年来一直在缩小，核弹头数量将会从“不到200枚”缩小到“不到160枚”。

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The world’s nuclear stockpile has already been cut by more than half over the past 20 years—from its Cold War peak of about 70, 000 warheads to today’s 23, 000.

在过去20年，世界囤积的核弹头数量已经削减了超过一半——从冷战高峰期的七万枚下降到如今的两万三千枚。

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But experts say no-one knows how large the world stockpile of nuclear material is because not every country reports what it's producing.

VOA: standard.2010.04.06

How can we achieve deterrence as our nuclear stockpile grows older and more strategically limited?

CENTERFORSECURITYPOLICY: Center for Security Policy | Don��t Go There: President Bush Must Avoid Temptation to Make Unwise Cuts in U.S. Nuclear Deterrent Forces

Unfortunately, modernization of the nuclear stockpile is hampered by the absence of nuclear tests.

CENTERFORSECURITYPOLICY: Center For Security Policy

Yet most would predict that Russia will continue to possess a large nuclear stockpile for the foreseeable future.

CENTERFORSECURITYPOLICY: Summary of the Center for Security Policy's High-l