没有哪种食物是必不可少的，但有些营养成分对身体健康是不可缺少的。

There is no food that is essential, but there are nutrients that are necessary for good health.

youdao

在食物来源中，蛋白质是构成身体血液，肌肉和组织的主要成分，它也是身体成长和康复不可缺少的营养素。

Among human being's food resources, protein is the major elements for the composition of body blood, tissue organs, also it is the indispensable nutritional element for body growth recovery.

youdao

所以，专家认为，蛋白质是人体不可缺少的重要营养成分，即使在节食减重的过程中也不应减少蛋白质的摄入。

So, the expert thinks, protein is the important nutrition composition with indispensable human body, although be on a diet, decrease what protein also should not decrease in heavy process to absorb.

youdao