These findings suggest that deficiency in brain serotonin synthesis may be an important risk factor for depression. "2."

这些结果表明，大脑内5 -羟色胺合成不足可能是抑郁症的重要危险因素。

youdao

A deficiency may be a risk factor for heart disease and stroke.

缺少它可能对你的心脏病和心率跳动都是很危险的。

youdao

IDDs still constitute a public health problem throughout urban areas in the Sudan and iodine deficiency appears to be the main etiological factor involved.

碘缺乏症仍然是苏丹城市地区的公共健康问题，并且碘缺乏似乎是其中的主要病因。

youdao

Vitamin B-12 deficiency anemia caused by a lack of intrinsic factor is called pernicious anemia.

CNN: Vitamin deficiency anemia

However, a vitamin B-12 deficiency is most often due to a lack of a substance called intrinsic factor.

CNN: Vitamin deficiency anemia