中国在世界上最早用人工方法合成一种有生物活力的蛋白质--结晶胰岛素。

China was the first country in the world to synthesize crystalline insulin, a bioactive protein.

牛乳中的固态物质包括盐分、蛋白质和糖。

Milk solids include salts, protein and sugar.

食物，粮食通常是源于植物和动物的物质，包含有人体营养物的必不可少物质或由其组成如：糖类、脂肪、蛋白质、维他命和矿物质等，由产生能量、促进发育和维持生命的组织消化和吸收

Material, usually of plant or animal origin, that contains or consists of essential body nutrients, such as carbohydrates, fats, proteins, vitamins, or minerals, and is ingested and assimilated by an organism to produce energy, stimulate growth, and maintain life.

抗体，免疫体血液或组织针对某种抗原如细菌或毒素而产生的蛋白质物质。抗体消灭细菌或削弱其作用，中和有机毒素，因而形成免疫力

A protein substance produced in the blood or tissues in response to a specific antigen, such as a bacterium or a toxin. Antibodies destroy or weaken bacteria and neutralize organic poisons, thus forming the basis of immunity.

角蛋白一种不溶解的较硬的蛋白物质，是头发、指甲、角和蹄的主要结构成分

A tough, insoluble protein substance that is the chief structural constituent of hair, nails, horns, and hoofs.