After four years' hard work and refinement of tons of pitchblende, Marie and her husband at last saw the dim blue light of the new element-radium.

四年的辛勤工作和提炼了大量的沥青铀矿，玛丽和她的丈夫终于看到了发出暗蓝色微光的新元素——镭。

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Therefore, we determine the exhibition title of Refinement of Light after team discussion.

因此，经过策展团队的商讨，我们确定了《光之炼金术》这个展览题目。

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Does it need refinement in some way?" "And if it does need some adjustment in light of the events that have taken place over the last number of months, including the election and so on, and then what are the implications of that in terms of General McChrystal's resource request?" The secretary said the United States will not abandon its core mission in Afghanistan, which President Obama described as the destruction of the al-Qaida terrorist network, because it is "critical" to U.S.national security.

VOA: standard.2009.10.23

The second problem--getting the light in there--was solved by the invention and refinement of the lightemitting diode and the laser in the past 20 years.

FORBES: The Trials Of Amory Houghton Jr.