Thus, we need to start getting rid of this material along with fissile material created for weapons use.

因此，我们在清除用于制造武器的裂变材料的同时也需要开始清除这类材料。

youdao

And we will call upon countries to begin negotiations in January on a treaty to end the production of fissile material for weapons.

我们将呼吁各国从明年一月开始谈判一项协议，以终止可用于武器的裂变材料的生产。

youdao

Uranium enrichment is the process used to make fuel for nuclear power plants, but when extended it can also produce fissile material for an atomic bomb.

VOA: standard.2009.11.28

So the main constraint on Iran going nuclear is the availability of fissile material.

ECONOMIST: Nuclear proliferation

To make the fissile material, he needs to develop an ability to enrich uranium.

CNN: Transcript of Powell's U.N. presentation

They set out a four-year timetable to gather up and secure bomb-usable fissile material.

ECONOMIST: Disarmament and counter-proliferation