单词vitamin D
un.: 维生素D；胆骨化醇；胆钙化醇；胆沉钙固醇
网络: 维他命D；维生素丁
胆沉钙固醇
胆钙化醇
胆骨化醇
维生素D
How much vitamin D does a healthy person need?
一个健康人需要多少维生素D？
Milk is one of the primary sources of vitamin D for most kids, and it has been a growing trend for kids to not drink milk each day.
对于大多数儿童而言，牛奶是维他命D的主要来源，现在不喝牛奶的孩子日趋增多。
If you spend at least fifteen minutes a day in the sun without a product to block the sun"s radiation, you probably get enough Vitamin D.
如果每天在无摭挡的情况下在阳光下待上至少50分钟，你可能就会得到足够的维生素D了。
But he says, first, scientists must carry out a large control study in which some people get vitamin D and others do not.
同时，他还说，科学家们首先要对服用与不服用维生素D的不同人群做大量的控制性研究。
I believe it would be very easy to use good models of fibrosis or cancer and try vitamin D.
我相信使用较好的肝维化或癌症动物模型来研究维生素D将是非常容易的。
In 1997, the United States Institute of Medicine established levels for how much Vitamin D healthy people need.
1997年，美国医学研究所制定了一个健康人每天所需的维生素D摄入量。
The nutrition experts are taking another lookandat how much vitamin D and calcium people should get.
营养学研究者正在重新看待人们需要摄入多少维生素D和钙。
The doctors who ran the study tested 307 adolescents to discover how much vitamin D was in their blood.
有医生对307青少年做研究，测定他们的血液的维生素D含量。
So how much is enough vitamin D?
这样人体要获得多少维他命D才算够了呢？
Some people get more with vitamin products. Another way is with the sun. Vitamin D is known as the sunshine-vitamin.
有些人通过维生素产品获取更多的维生素，另一种途径则是利用日光。