Enriched uranium can be used as fuel for nuclear energy as Iran says or it can be used for nuclear bombs.

VOA: special.2009.09.26

So I just want, you know, I feel like that experience would be enriched if I, you know, learned the language.

我始终觉得，如果我会韩语的话，我在韩国的经历会更加丰富。

学习外语的原因 - SpeakingMax英语口语达人

You'd want to make sure that you separated the virus from all the other parts of cow skin so that your ultimate preparation was enriched in the virus and didn't contain quantities of other things that would be hazardous.

你要保证,你从所有的牛皮组织上分离出病毒,这样最终的制剂产品才会富集病毒,并且不会携带其它物质,这些物质可能带来危险

耶鲁公开课 - 生物医学工程探索课程节选

In Washington, a military intelligence official told a Senate committee that Iran could be one year away from producing enough highly-enriched uranium for a nuclear weapon.

VOA: special.2010.04.17

"But the hitch is now news coming out of Tehran, which suggests they may be actually looking to purchase at more highly enriched levels up to 20 percent.

VOA: standard.2009.10.19

The Iranian government strenuously insists its nuclear program is peaceful and its supplies of enriched uranium will be used to produce electricity for civilian nuclear power plants it is building.

VOA: standard.2009.10.28

The IAEA draft deal calls for Iran to ship its stockpile of low-grade enriched uranium to Russia to be transformed into more highly enriched uranium for use in Tehran's medical research reactor.

VOA: standard.2009.10.28

"I mean,he hands over 80 percent of his low-enriched uranium: that means for the next 13 months he will not be able to go down that path, meaning that he will lose a lot of leverage with the West,"

VOA: standard.2009.10.28

He said the Iranian official told the diplomats that even if Tehran accepted a big power offer of last November to export some of its enriched uranium to be reprocessed as fuel for a research reactor, the broader Iranian enrichment drive would continue.

VOA: standard.2010.05.14

Iran has sent mixed signals about its response to the plan, under which much of the low-enriched uranium Iran has produced in its controversial enrichment program would be shipped abroad for processing, a step that would ease Western concerns about Iran's nuclear intentions.

VOA: standard.2009.11.09