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But digestion is not the only nutritional service provided .

但是消化不是获取营养的唯一方式。

They can invade the digestive tract and block nutritional uptake .

它们可以入侵消化道，然后阻止营养的摄取。

Hair and skin cells are constantly reproducing and are , therefore , very sensitive to nutritional deficiencies , explains dr. alkek .

阿尔凯克大夫解释说，头发和皮肤细胞是不断再生的，因而对营养的缺乏非常敏感。

An egg 's not only a nutritional powerhouse , it 's also loaded with protein that satisfies .

鸡蛋绝不仅仅是营养的能量来源，它同时富含优质蛋白。

The un 's food and agriculture organisation says insects are vital to meeting the nutritional needs of the world 's growing population , but they hardly feature in the diets of many rich nations .

联合国食品和农业组织指出，为满足世界上不断增长的人口对于营养的需求，昆虫将起到至关重要的作用，但是它们很难构成许多富裕国家的饮食。