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 .
