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.
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.
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.
肪是人体不可缺少的组成成分，常以各种磷脂和糖脂等形式存在于细胞膜以及脑和外周神经组织中。
Body fat is an essential component, often exist in various forms, such as glycolipids and phospholipids in the brain and peripheral nerve cells and tissues.
大蒜素是大蒜的主要成分，除了具有杀菌、保健的功效之外，大蒜素还是烹饪调味中不可缺少的风味物质。
Allicin is the main composition of garlic. Besides its sterilization and healthcare functions allicin is still an indispensable flavoring substance for cooking seasoning.
大蒜素是大蒜的主要成分，除了具有杀菌、保健的功效之外，大蒜素还是烹饪调味中不可缺少的风味物质。
Allicin is the main composition of garlic. Besides its sterilization and healthcare functions allicin is still an indispensable flavoring substance for cooking seasoning.
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