protein
/ˈprəuti:n; `protin/ n[C, U]
substance found in meat, eggs, fish, etc that is an important body-building part of the diet of humans and animals 蛋白质; 朊
essential proteins and vitamins 必不可少的蛋白质和维生素
They were weakened by a diet that was low in protein. 他们日常饮食中蛋白质含量不足, 因而身体虚弱.
[attrib 作定语]
protein deficiency 蛋白质缺乏.