Securing nuclear materials must be a serious and sustained global effort.

确保核材料的安全必须是一个认真和持续的全球性努力。

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One of the radioactive materials released by reactors is radiative isotopes of iodine, which poses a serious health risk particularly to children.

反应堆释放的一种放射性物质就是碘的同位素，其会人们尤其是儿童造成严重的健康损害。

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I'd never made any instrument before, never really even worked with wood, metal, or other serious building materials. But, enthusiasm can overcome a lot of challenges!

在那之前我从来没有做过乐器，甚至从来没有真正用木头、金属或者其他正儿八经的建筑材料做过东西。但是，热情能够战胜很多困难！

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The list brings companies like augmented reality pioneer Layar to a wider public and introduces Novomer, pollution chemistry, and Serious Materials, energy reduction.

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Serious Materials, a venture-backed company, has been selling better-insulated windows.

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Steve serves on the board of directors of SunRun, Akiban, and Sentient Energy, and he is actively involved with eMeter, EnerNOC, and Serious Materials.

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