They also urged Iran to honor the United Nations demands to stop enriching uranium and open its nuclear program to international inspectors.

VOA: special.2009.02.07

Elements beyond uranium, these are synthetic.

铀元素之后的元素，是人工合成的。

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It promised to give up all of its highly enriched uranium by two thousand twelve.

VOA: special.2010.04.17

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

He won for producing new radioactive elements beyond uranium.

VOA: special.2009.06.14

Iran has rejected the December 31 deadline set by the international community to accept a deal to enrich its uranium overseas.

VOA: standard.2010.01.04

The U.N.Security Council has imposed three rounds of sanctions on Iran for refusing to stop enriching uranium at home.

VOA: standard.2009.10.19

Speaking at his weekly news conference, Qashqavi said Iran is ready to discuss getting enriched uranium from other countries.

VOA: standard.2009.10.12

They will discuss a tentative agreement, reached earlier this month in Geneva,for uranium from Iran to be enriched outside that country.

VOA: standard.2009.10.19

Iran has not given a clear response to a U.N.proposal to send uranium to Russia and France for enrichment.

VOA: standard.2009.11.16

Iran disclosed the underground uranium enrichment facility this week, when it found out western intelligence agencies had information on the plant.

VOA: standard.2009.09.25

The U.N.and U.S. imposed fresh sanctions on Iran, last month, to force it to stop enriching uranium for its controversial nuclear program.

VOA: standard.2010.07.23

The uranium would then be returned to Tehran for use by a small research reactor making medical isotopes.

VOA: standard.2009.10.19

Tehran has not,as yet, agreed to the terms of a UN-draft deal to trade for highly enriched uranium from France and Russia.

VOA: standard.2009.12.18

"With the highly enriched uranium you are still dealing with three to five years to create a weapon."

VOA: standard.2010.04.14

That deal would commit Iran to shipping about 75 percent of its lightly enriched stockpile of uranium to Russia for further enrichment.

VOA: standard.2009.10.21

Until this year, Pyongyang has denied U.S.accusations it possessed a covert HEU, or highly enriched uranium program, in violation of previous agreements.

VOA: standard.2009.09.06

An Iranian official told the Reuters news agency that Tehran would produce the highly enriched uranium at home if the Vienna talks fail.

VOA: standard.2009.10.19

Friday,Tehran delayed its response to a proposal made by the US, France and Russia to further enrich Tehran's existing stockpile of low-grade uranium.

VOA: standard.2009.10.24

She said those include a lack of recognition of the deep concern over Iran's intention to continue enriching some uranium to high levels.

VOA: standard.2010.05.25

According to reports, the deal would have Russia taking in partially enriched Iranian uranium for further enrichment.

VOA: standard.2009.10.19

French Foreign Minister Bernard Kouchner rejected Iran's latest move on its uranium-enrichment efforts as a diplomatic "pirouette."

VOA: standard.2010.01.04

Iranian officials are to meet with Western powers later this month to discuss enriching uranium abroad.

VOA: standard.2009.10.12

"And I really don't know what will disappear first, their enriched uranium or their poor government,"

VOA: standard.2009.06.21

In April,the P5+1 offered Iran a revised package of incentives for it to halt uranium enrichment and return to negotiations over its nuclear program.

VOA: standard.2009.09.11

The plan calls for Iran to send uranium abroad for enrichment, but Tehran countered with conditions to what was presented as a take-it-or-leave-it proposition.

VOA: standard.2009.11.15

Separately,Tauscher cautiously welcomed an announcement by Iranian President Mahmoud Ahmadinejad that Tehran is ready to send its enriched uranium overseas in exchange for nuclear fuel.

VOA: standard.2010.02.03

"Last September,the world learned that Iran had secretly built another uranium-enrichment facility at Qom, in clear violation of Security Council resolutions and Iran's IAEA obligations."

VOA: standard.2010.06.09

It is also important to secure nuclear materials in countries that enrich uranium for fuel.

VOA: standard.2010.08.06

"Last November,Iran announced that it would build In February, Iran said that it would begin to enrich uranium to nearly 20 percent-moving,closer to weapons-grade material."

VOA: standard.2010.06.09