Used properly, sunscreens with an SPF of 8 or higher completely block UVB radiation and prevent synthesis of vitamin d.

使用得当的防晒系数为8或更高的防晒霜在完全阻挡紫外线辐射的同时也阻止了维生素d的合成。

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That's a problem, particularly when it comes to vitamin D. Federal guidelines recommend that children get 400 I.U. of the vitamin a day, equivalent to four 8 oz. glasses of milk.

这是一个难题，尤其涉及到维生素d时，联邦准则建议这种维生素儿童摄入量应为每天400iu，相当于4杯8盎司玻璃杯的牛奶。

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I also worked on movie clip playback and on a dedicated color-corrector to translate Cineon images to 8 bit, this is what led me to concentrate on images rather than 3-d.

我还做过视频剪辑配乐工作以及将赛能格式图片转换到8比特的渲色纠错师工作，正是这些工作让我将自己的注意力放在图片而不是3d上。

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Approving or disapproving the proposals has been pushed off multiple times this year, with December 8 the next D-Day for Nasdaq and January 12 for NYSE Arca.

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Rep. John Conyers (D- Michigan) sponsored the bill on April 8, 1968, 44 years ago.

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There should be 8, 000 3-D screens by the end of the year, according to the National Association of Theater Owners, but even that could be a tight squeeze for so many films.

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