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大部分的边缘海,如日本海,菲律宾海和南中国海等与太平洋,大西洋和印度洋一样,都是由于海底扩张而形成。为了阐明日本列岛形成过程,就不能不掌握边缘海的特征及其形成史。
Most of the fringe seas such as the Sea of Japan, the Philippine Sea and the South China Sea, like the Pacific, the Atlantic and the Indian Ocean, are formed by the expansion of the seabed. In order to clarify the formation process of the Japanese archipelago, we can not but grasp the characteristics of the marginal seas and their formation history.