English-Chinese/Proteins are essential nutrients for the human body. They are one of the building blocks of body tissue and can also serve as a fuel source

Proteins are essential nutrients for the human body. They are one of the building blocks of body tissue and can also serve as a fuel source.

蛋白质是人体必需的营养素. 它们是身体组织的构建块之一，也可以作为燃料来源.