求翻译：本文介绍了蛋白质的定义，功能,作用 ，组成，消化、吸收和代谢。蛋白质营养学和蛋白质营养不良及营养状况。以及研究了蛋白质参考摄入量及食物来源。是什么意思？

This article describes the definition of protein, function, role, composition, digestion, absorption and metabolism. Protein nutrition and protein malnutrition and nutritional status. Reference and research of protein intake and food sources.

This article describes the role, function, and definition of protein, composition, digestion, absorption, and metabolism. Protein nutrition and protein-energy malnutrition and nutritional status. As well as to study the protein intake and food sources for reference.

This article introduced the protein definition, the function, the function, the composition, the digestion, the absorption and metabolism.Protein nutriology and protein malnutrition and nutrition condition.As well as has studied the protein reference amount of radiation and food origin.

This article describes the protein's definition, function, role, composition, digestion, absorption and metabolism. Protein nutrition and protein malnutrition and nutritional status. Reference intakes and the study of proteins and food sources.

This text has introduced the definition of protein, the function, the function, make up, digesting, absorb and supersession. Protein nutrition and protein are malnutritive and nutritional status. And studied protein and consulted intaking amount and food source.