古往今来,时序流转,人类各民族世世代代劳作生产、生殖繁衍,人们的一切活动及其成果便构成了他们各自民族的文明历史。 Throughout the ages, the flow of time has changed. All ethnic groups in the world work and produce their products for generations and multiply their reproductive functions. All the people’s activities and their achievements constitute the civilized history of their respective peoples.