古人云：“国以民为本，民以食为天。”可见，“食”对于人们是多么的重要。如何理解这个“食”字？随着社会历史的发展，人们的实践和认识都在不断深化。(There is an old saying that a country is formed based on its people, while what to eat and how to eat well matter most to people. From this saying, we can see how important this "eat" matters to people. How to understand the meaning of the world "eat"? As the society develops, people's practice and knowledge also deepens.)