Lack of vitamin D is another factor to consider.

缺乏维生素D是另一个需要考虑的因素。

《柯林斯英汉双解大词典》

She said that the use of sun creams and moisturisers with a sun protection factor also reduces UV absorption and so vitamin D production.

她说，使用含有防晒因子的防晒霜和保湿露也能减少紫外线的吸收和维生素D的合成。

youdao

Objective:To study the relation between expression of vascular endothelial growth factor D (VEGF-D) and lymphatic metastasis in hypopharyngeal carcinoma.

目的：研究血管内皮因子D（VEGF-D）在下咽癌组织中的表达及其与淋巴结转移的关系。

youdao

If you could introduce that gene you'd make the chemical, in this case it's a protein called vascular endothelial growth factor.

通过导入一种生成特殊化学物质的基因,这种疗法中指的是一种蛋白,叫做血管内皮生长因子

耶鲁公开课 - 生物医学工程探索课程节选

Then they'd be a factor in what might be a very finely balanced future parliament.

BBC: Numbers game

However, a UK expert questioned whether vitamin D was the principal factor behind the high rates of Crohn's disease.

BBC: Bowel disease linked to vitamin

And really, there wouldn't have been much of a downside if Acer went with that form factor instead: you'd get the cradle and keyboard in one piece, along with a built-in battery and a smattering of ports.

ENGADGET: Acer Iconia W700 review: a Core i5 Windows 8 slate that doesn't skimp on battery life