As a result, diseases caused by nutrient deficiency are rare in the United States.

因此在美国由营养缺乏引起的疾病很少。

The frontal lobes are so sensitive to drops in glucose, in fact, that a change in mental function is one of the primary signals of nutrient deficiency.

大脑前庭对葡萄糖供给下降十分敏感，实际上，心智功能产生的变化就是营养不足的一个重要信号。

It is found that soil nutrient deficiency and unbalanced fertilization to rice crops have a negative effect on diversity of microbial communities and total microbial biomass in the soil.

可见，土壤中养分不足或供应不平衡，不仅影响水稻养分的吸收，而且对土壤微生物总量和群落多样性产生重要影响。