随着社会的发展，人们生活水平与生活质量意识的逐步提高，人类对食品提出了新的要求。从原始食品进化到传统食品以至发展到现代食品，无不反映人类对自身饮食生活进行革新的强烈意识。在即将进入２１世纪之际，人们又需要“绿色食品”和“有机食品”，这表明人类对“健康饮食? With the development of society, people’s living standards and quality of life consciousness have gradually increased, and humanity has put forward new requirements for food. The evolution from raw foods to traditional foods and even to modern foods all reflect the strong awareness of human beings to innovate in their eating habits. When it comes to the 21st century, people will need “green food” and “organic food.” This shows that people have a “healthy diet?”