How much of their fissile material capabilities are there? Some people say half. Some people say more.

那里裂变材料生产能力有多少？一些人认为有一半。还有人认为比一半还要多。

Second, Russian fissile probably destroys more habitat than it creates.

次，俄罗斯裂变材料栖息地可能多于创造栖息地。

In addition, the deal calls on Iran to reduce the enrichment level of its existing nuclear, or fissile, material.

此外，该协议要求伊朗降低现有核材料或裂变材料浓缩水平。

And she says to make the bomb, the Manhattan Project scientists needed to use something called fissile material.

她说，为了制造炸弹， 曼哈顿计划需要使用一种叫做裂变材料东西。

The latter are much more difficult to design and build, but provide higher explosive yields for a given amount of fissile material.

后者在设计和制造上要困难得多，但可以在给定数量裂变材料下提供更高爆炸当量。

The reactors use " tristructural isotropic particle fuel" , in which blobs of fissile uranium (along with oxygen and carbon) are wrapped in layers of carbon and silicon carbide.

反应堆使用了“三结构各向同性颗粒燃料”，可裂变铀（以及氧和碳）斑点被包裹在碳和碳化硅层中。

The latter were enormous undertakings given the technology available to the Manhattan Project, as it was extremely costly and time consuming to enrich these to become fissile substances in the mid-1940s.

考虑到曼哈顿计划现有技术，后者是一项艰巨任务，因为在 20 世纪 40 年代中期将这些物质浓缩为裂变物质成本极高且耗时。