He was, they said, planning to build a dirty bomb that could scatter radioactive material over a city, probably Washington, DC.

官员说，帕迪拉正打算造一枚脏弹，可将辐射性物质遍布全城，目标也许是华盛顿特区。

youdao

And that larger amounts of other radioactive material, from discarded X-ray machines to spent fuel, might be used to make a dirty bomb.

其他大量的放射性材料，从废弃的X光机到核废料，可能被用于制造脏弹。

youdao

In Chernobyl the explosion was caused by excessive pressure buildup hydrogen explosion and rupture of all containments propelling molten core material into the environment (a "dirty bomb").

在切尔诺贝利，爆炸是因为压力过高，氢气爆炸，所有的容器爆裂，把熔融的(反应堆)核心物质撒向了环境中(一个“脏弹”)。

youdao

But the acquisition of radioactive material for a so-called 'dirty bomb,' which is radioactive material that is dispersed with a conventional explosive device, that is not that challenging.

VOA: standard.2009.05.01

Word of the October alert was just the latest sign of the concerns U.S. officials have about the possibility al Qaeda or another terrorist network might gain access to a nuclear device -- either a nuclear weapon or a so-called "dirty bomb, " one that contains radioactive material spread by detonating a conventional explosive.

CNN: Nuclear weapon plot deemed not credible

Dirty Nukes--suitcase-size bombs made of explosives studded with scavenged chunks of radioactive material--could become the next tool of terrorism, far more devastating than hijackings and anthrax.

FORBES: Stopping Porta-Nukes