There are a number of vitamins that are vital for good hair health, the main ones being vitamins C, D and E, and in a balanced diet all these vitamins should be readily available.
有许多对头发健康至关重要的维生素，主要有维生素C、D和E，而在平衡的饮食中所有这些维生素应该很容易获得。
The ions exchange between calcium ions and zinc ions in L-guluronic acid units would influence the binding ability of zinc ion in D-mannuronic acid units.
钙锌离子交换试验表明钙离子与锌离子在海藻酸古洛糖醛酸片段的离子交换会影响锌离子与甘露糖醛酸片段的结合。
The ions exchange between calcium ions and zinc ions would influence the binding ability of zinc ion in D-mannuronic acid units.
钙锌离子交换会影响锌离子与甘露糖醛酸片段的结合。
The role of vitamin D in the prevention of osteoporosis.
的作用，维生素d在预防骨质疏松症。
There probably is a risk to having too much vitamin D in the system.
可能会发生系统里存在过多维生素d的风险。
D in general, the quality of the renderings has been greatly improved.
一般来说，在透视图质量有了很大改善。
D in America, about half of workingwomen return to work within a year of having a baby.
在美国，大约一半的妇女劳动者生完小孩一年之内就返回工作。
Or course, short periods in the sunlight are also important for synthesizing vitamin D in the skin.
当然，晒一会太阳对于皮肤中维生素D的合成也是很重要的。
You can also get vitamin D in your calcium supplement if you choose a supplement that contains both.
你也可以选择服用一种包含钙和维他命d的双重补充剂。
The researchers measured the amount of vitamin D in blood samples from 279 women with breast cancer.
研究人员测量了279位乳腺癌患者血样中的维生素D含量。
World demand grew by an extraordinary 2.7m b/d in 2010, according to the International Energy Agency.
依照世界能源署的数据，2010年里世界的需求每日额外增加270万桶。
For the circular economy, we will support R&D in technology, demonstrations and applications, and capacity building.
支持循环经济技术研发、示范推广和能力建设。
Because ultraviolet rays also trigger the synthesis of vitamin D in the skin, sunlight is an important source of the vitamin.
由于紫外线也可以触发皮肤中维生素d的合成，因此日晒是维生素d的一个重要来源。
That can increase your risk for cancers of the skin. You can also get vitamin D in your calcium supplement if you choose a supplement that contains both.
你也可以选择服用一种包含钙和维他命d的双重补充剂。
In 2005, director George Lucas said he aimed to start rereleasing the 'Star Wars' movies in 3-D in 2007; the delay underscores some of the complexities at play.
2005年，导演卢卡斯(George Lucas)说，他希望2007年开始重新发行3D版《星球大战》；但后来的推迟显示出了其中的复杂性。
The trouble with this statistic is that America has lots of sources of R&D spending: federal money accounted for only $86 billion of the $288 billion that it spent on R&D in 2004.
不过这个数据有问题，因为美国研发支出的资金来源很多，比如2004年，研发总支出为$2880亿，而财政支出不过$860亿。
D Day is celebrated to memorize the Normandy landings in France on June 6, 1944.
D日是为了纪念1944年6月6日在法国的诺曼底登陆。
One of the first measures proposed by President Franklin D. Roosevelt when he took office in 1933 was the Agricultural Adjustment Act, which was subsequently passed by Congress.
在1933年，富兰克林·D·罗斯福总统上任时，提出的首批措施之一是《农业调整法案》。该法案后来在国会获得通过。
This special form of vitamin D is naturally present in breast milk.
这种特殊形式的维生素D天然存在于母乳中。
The orchestra played Mozart's Symphony No. 35 in D Major.
该管弦乐队演奏了莫扎特D大调第35交响曲。
These glasses allow you to see the film in three-D.
这副眼镜让你能看立体电影。
Foods such as eggs and oily fish are all rich in vitamin D.
鸡蛋和油性鱼等食物都富含维生素D。
In 2011, IBM, through its R&D Headquarters in Haifa, Israel, launched an agricultural cloud computing project.
2011年，国际商用机器公司通过其位于以色列海法的研发总部，启动了一个农业云计算项目。
That may change fast: lots of proposed date-security legislation is now doing the rounds in Washington, D. C.
这种情况可能很快就会改变：很多提议的信息安全法规正在华盛顿进行逐一讨论。
In the A, B, C, D and F grading system, the first four letters are typically considered passing grades.
在A、B、C、D和F评分体系中，前四个字母通常被认为是及格。
Although we talked about Vitamin D and sunlight, it can make a huge difference in how you feel if you go to a tanning salon to get some light on your skin.
尽管我们已谈到维生素D和阳光，但是如果你刻意去参加日晒沙龙来摄取阳光到皮肤的话，它会让你感觉到巨大的差别。
Oil production from Daqing peaked at about 1.1m barrels per day (b/d) in 1997.
大庆的石油产量在1997年达到峰值——每天110万桶（b/d）。
If a professional grading system existed, executives would never settle for a D- in their careers.
如果有专业的分级制度，经理人们永远不会满足于在职业生涯中获得D。
"The claim," he writes, "was made relative to the (a) share of (b) mobile platforms (c) installed base (d) in the US."
“这种说法，”他写道，“是基于(1)份额；(2)移动平台；(3)装机量；(4)在美国。”
"The claim," he writes, "was made relative to the (a) share of (b) mobile platforms (c) installed base (d) in the US."
“这种说法，”他写道，“是基于(1)份额；(2)移动平台；(3)装机量；(4)在美国。”
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