The mechanism of enrichment has been discussed.

本文对富集机理进行了讨论。

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The initial deal should trade suspension of enrichment for suspension of sanctions.

最初的协议应该以暂停浓缩活动换取暂停经济制裁。

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The aim of enrichment is to extract the rare form of uranium from the ore that miners routinely dig out of the ground.

浓缩的目的是从矿工经常从地下挖出的矿石中提取罕见的铀矿。

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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

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

"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

Meanwhile, Iran hopes to convince the world that pressing for suspension of enrichment is pointless.

ECONOMIST: Is there still time for a miracle?

Under the plan Mr Ahmadinejad presented to the cabinet, the level of enrichment would also be increased.

BBC: Iran accuses West of provoking new nuclear sites move

He explained that the line had to be drawn at the point where Iran had completed "the medium level of enrichment".

BBC: Netanyahu, Abbas display divergent priorities at UN