uranium bomb

( A uranium bomb runs on more than 90 percent uranium 235.) In today's reactors, some uranium 238 is converted to plutonium that is used as a small, supplemental fuel, but most of the plutonium is left behind as waste.

在目前的反应堆里，一些铀238被转化成钚，作为一种用量较小的辅助燃料来使用，但绝大多数的钚都会剩下来，成为废料。

But Iran would export about 58 per cent of its total stockpile of low-enriched uranium, a move that would constrain its ability to produce the highly enriched material needed for a nuclear bomb.

但伊朗将会出口约58%的低纯度浓缩铀储备，此举将限制其生产核武器所必须的高纯度浓缩铀的能力。

The " trigger " may be a conventional uranium-atom bomb.

这种 “ 引爆器 ” 可以是一枚常现铀原子弹.

Take samples on schedule from three types of specimen of three-combination nitroguanidine propellant packed and stored together with poor uranium alloy for closed bomb test, physicochemical properties inspection and proving ground test in order to study into the changing rules of the sample properties as the influence factors.

通过对包装贮存的三胍药与贫铀合金样品、包装贮存的贫铀合金结构件和装药结构按期取样，进行理化性能检测和靶场试验，研究样品的性能变化规律及影响因素。

This combination of uranium and hydrogen is called a " hydrogen bomb ".

这种铀和氢的结合,叫做 “ 氢弹 ”.