determination of thorium and uranium th和u测定
balance of radium and uranium 镭铀平衡
uranium mining and milling 铀矿开采与选矿
associated molybdenum and uranium ore 铀钼共生矿
radioactive elements thorium and uranium 放射性元素钍和铀
uranium mineral and uranium-bearing ore 铀矿物和含铀矿石
uranium minerals and uranium-bearing ores 铀矿物和含铀矿石
Helium is the by product of millennia of radioactive decay from the elements thorium and uranium.
氦是钍和铀元素数千年放射性衰变的副产品。
Nuclear power results in up to 25 times more carbon emissions than wind energy, when reactor construction and uranium refining and transport are considered.
而如果把核反应堆的建设和铀的提炼和运输过程算上，核能的碳排放量是风能的25倍。
Why not build more?The technology is mature, its planet-heating emissions are low and uranium can be bought from friendly, stable countries like Australia and Canada.
既然核技术已经成熟，核电站的温室气体排放量也很低，铀也可以从澳大利亚和加拿大这些友好、稳定的国家买进，为什么不多建造一些?
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
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
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
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