最初蛋白质的起源

the origin of the fore-protein

对于素食者来说， 豆类食物是蛋白质的理想来源。

Pulses are a good source of protein for vegetarians.

素食者所摄取的蛋白质不是来自肉类而是来自近似肉类的食物。

A vegetarian gets protein not from meat but from its analogues.

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.