protein
/ˈproʊˌtin/
any of a large group of nitrogenous organic compounds that are essential constituents of living cells; consist of polymers of amino acids; essential in the diet of animals for growth and for repair of tissues; can be obtained from meat and eggs and milk and legumes
中文释义：蛋白质
A balanced diet should include sufficient protein from sources like meat and beans.
均衡饮食应包括来自肉类和豆类等来源的充足蛋白质。
Athletes often consume protein shakes to help repair muscles after exercise.
运动员经常饮用蛋白质奶昔以帮助运动后修复肌肉。