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我们人类赖以生存的地理环境，其间有无穷的奥秘。它过去的面貌，历史发展演变的情况，以及它将来可能变化的方向，这是关系到人类命运的大问题。因此，它是中外学者，特别是自然科学史研究者普遍关心的问题。中国的地理环境，近世以来遭逢了数千年来从未经历过的巨大变局。这
In the meantime, there are infinite mysteries in the geographical environment in which our human beings depend. Its past appearance, the evolution of its history, and its possible direction of change in the future are major issues concerning the fate of mankind. Therefore, it is a common concern for Chinese and foreign scholars, especially those in the history of natural sciences. China's geographical environment has suffered a huge change in the world since it has not been experienced for thousands of years. This