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

Not only the IgG but there are special antibodies called secretory IgA and these are highly enriched in mucosal fluids in the mucus lining of your gut, and the eye, and of other--of mucosal organs.

不仅仅是IgG分子,还有一些特殊的抗体,被称作分泌型免疫球蛋白A,IgA在体内粘液中广泛存在,例如,在小肠内壁和眼球周围以及,其他带有粘膜的器官中都有IgA的分布

耶鲁公开课 - 生物医学工程探索课程节选

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

VOA: standard.2010.04.14

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

"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 number-two military man at the Pentagon, General James Cartwright, said it would probably take several more years for Iran to take that highly enriched uranium and develop a usable weapon.

VOA: standard.2010.04.14

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

Several Iranian politicians close to Supreme Leader Ayatollah Ali Khamenei have demanded Tehran ship only part of its enriched-uranium stockpile abroad until some of the batch shipped to Russia was returned in more highly enriched form.

VOA: standard.2009.10.28

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

Lieutenant General Ronald Burgess response this question from Levin, "With the installed centrifuges that they have, how long would it take,approximately, to produce enough highly-enriched uranium for one nuclear weapon?"

VOA: standard.2010.04.14