人类世世代代生活在地球上。地球给人类生活提供许多必需的物质资料,同时它的某些自然现象又给人类带来灾害。因此,人们对这个与他们生活有密切关系的星球,总想了解它,认识它。我们的祖先在很早时期就曾企图解释地球,因而产生了种种臆说和推断。随着社会生产力的发展及生产的需要,人们对地球认识的范围也愈来愈广,发现了某 Human beings live on earth for generations. The Earth provides many essential material information to human life, and some of its natural phenomena also bring disasters to human beings. Therefore, people want to know this planet that is closely related to their life. Our ancestors had attempted to explain the Earth at an early stage, resulting in a myriad of assumptions and inferences. With the development of social productive forces and the need of production, the scope of people’s understanding of the earth is getting wider and wider.