"You can look at it like a couple of very large uranium mines," he said of the fissile material that would result from the program.

“你可以把它看成好几座大型铀矿(的裂变原料在支持这个方案)。”他说。

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

First, ending the stalemates on the Fissile Material Cut-off Treaty and the Comprehensive Nuclear Test Ban Treaty.

BBC: In full: Brown security statement

Fissile material in this form is difficult to use in a weapons program, U.S. and European officials say.

WSJ: Iran Talks Off to Shaky Start

Fissile material in this form is difficult to use in a weapons program, U.S. and European officials said.

WSJ: Iran Cools Nuclear Work as Vote Looms